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Exploration list 8/8/2006

Accelerometer, measure acceleration with a protractor

Afterimage, Move a minimag light around in space and observe the stringlike afterimage.

Aluminum Air Battery, Use activated charcoal and aluminum foil to make a battery.

Ammeter, wind your own coil and make an ammeter

Anti slit, project the spectrum of an antislit through a diffraction grating on an overhead projector

Atmosphere Bar, make a steel bar that exerts the same force on you as the earth's atmosphere.

Atmosphere Composition Model, Make a model of the components of the earth's atmosphere using dyed rice.

Atmosphere Scale Model, Use an earth globe and two rectangles of plastic cut from a 2 L bottle to model the thickness of 90% of the atmosphere, and the troposphere too.

Attract a water surface electrostatically, Charged plastic can pull up a mound in water.

Audible Magnetic Domains, Use an iron cored coil and audio amplifier to listen to the motion of magnetic domains, known as the Barkhausen effect.

Ball Bounce in a Mirror, Bounce two balls on opposite sides of a mirror, stop bouncing one ...

Ball Packing, Steel spheres in a gentle bowl pack in a hexagonal closest packed array with flaws that can be annealed out.

Balloon Universe, Blow up a balloon and model the expansion of the universe.

Batteries and Bulbs, Use the bulbs themselves to probe the power distribution in series and parallel circuits.

Battery, Bulb, Meter, Make a flashlight then measure voltages and currents with a meter.

Battery Bulb Meter 2000, measure series and parallel circuits containing batteries and bulbs.

Battery Dissection, take apart a carbon zinc battery.

Bicycle Gear Mathematics, count teeth on bicycle gears and find ratios.

Bifurcation, droplets of food color divide over and over when dropped into water.

Binocular Vision, the view from one eye is not the same as the view from the other.

Black Sand Exploration, Magnetic sand is pulled into spikes when near a magnet.

Blind spot, use a minimag light to "see" your blindspot

Blinky Lights Use Inova Microlights and time lapse photography to document motion.

Blow between cans to make them move together or apart. Bernoulli in action.

Blow Out Your Toaster, Heat a nichrome wire to incandescence then blow it out. Vibrate it with a magnet.

Bohr Atom Model, Use a gravity well to model how stable electron orbits form around a proton.

Boyle-ing water, boil water at room temperature by reducing the pressure.

Bouncing Ball, drop a steel ball onto a steel surface and listen to the pattern of bounces, listen to Zeno's paradox. (You can also drop it onto a can covered with a balloon.)

Bouncing Balls, bounce a tennis ball on a basketball, it will gain energy.

Bouncing Egg, Drop an egg on a basketball the bounce is surprising and eggs-citing.

Buoyancy, compare the buoyancy of crumpled aluminum foil to flat.

Bubbles in a bottle, Fill a bottle with soap solution, pour it out and the bottle will fill with bubbles.

Bubble Prints, Blow bubbles in a solution laced with food coloring and you can lift bubble prints onto paper.

Burning peanut, Use the heat flow from a burning peanut to boil water and measure the energy in the peanut.

Camera Dissection, Take apart a disposable camera.

Camera Electronics, study the strobe unit electronics on a disposable camera.

Candle in Freefall, drop a candle in a plastic bottle and observe how it behaves in freefall.

Candles in a jar, Observe candles at different levels in a jar go out one by one.

Candle in a vacuum, Slowly pump the air out of a jar containing a candle.

Carbon Dioxide Model, Make a model for one of the infrared resonances of carbon dioxide using tennis balls, racquet balls and hacksaw blades.

Car Science, science through your windshield.

Cardiod, use magnets to draw a cardiod

Chaotic Pendulum, an exploration of the exhibit or the toy.

Circle Universe, imagine how the expansion of a universe that is a circle would appear to an inhabitant of the circle.

City Universe, Imagine a city in which light travels one block per decade, how would it look? An exploration of time in the universe.

City Universe Size, map the size and locations of objects in the 14 billion year old universe onto a city street that is 14 blocks long.

Color, Diffraction Grating, project a slit of light on an overhead projector and spread it into a spectrum with a holographic diffraction grating.

Colored Shadows, A red green and blue light make magenta, cyan and yellow shadows.

Colored Shadows Mirror, Reflect light off a mirror at the colored shadows exhibit.

Colors of Nature, A two day exploration of colors in Nature.

Comparing Yellows, an exploration at an Exploratorium museum exhibit.

Computer polarized light source, Use a portable computer as a source of polarized light.

Computer Stroboscope, watch a rubber band vibrate in slow motion in front of a computer screen.

Conduction, Convection, Radiation, Use liquid crystal thermometers to investigate heat flow.

Coupled Pendulums, Explore how two coupled pendulums send motion back and forth.

Cratering, Make craters in salt and study ejecta.

Crater illusion, rotate the image and make the craters into bumps

Curve Balls, use the magnus force and Bernoulli's equation to explain curve balls.

Curved Pi, what is the ratio of the circumference of a circle to its diameter on a sphere?

Curved Space, There is more distance between two objects when a massive object is brought nearby.

Cylindrical Mirror Image, How to find the two different locations of the image made by a cylindrical mirror.

Dance of the Day and the Year, Why the length of the day varies from 24 hours over the course of a year.

Dance of the Sound Wave, dance out a sound wave step by step.

Dance of the Sun and the Moon, Dance your way to understanding Eclipses.

Decibel meter, measure the loudness of sound with a meter.

Decibel meter, measure the loudness of a rining aluminum rod with distance and time

Diffraction, Observe the diffraction of light as it passes through a narrow slit. Uses a minimaglight.

Diffraction grating , explore color

Domino Model of a Nerve, a line of falling dominos models the discharge of a nerve.

Doppler model, make circles on transparency material and model the Doppler effect.

Drop a Slinky, the top of the slinky falls faster than g.

Dry Tongue, Dry taste buds don't work. Sugar on a dry tongue is not sweet.

Earth Rotation, measure the length of a sidereal day.

Electric Current Model, magnets rolling around the rim of another magnet model electricity.

Electric Dill, Put dill in oil, move it with electrostatic fields.

Electrophorus, move charge around

Electrostatic attraction of water, hold an electrically charged comb over the surface of water and watch the reflections in the surface of the water distort.

Electrostatic clearing of mist, use an electric wind from a Van deGraaf to move CO2 mist.

Electrostatic Motor, Move a meter stick with an electrically charged rod.

Empty a bottle, how fast can you pour water out of 2L bottle.

Energy Level Model, use a stool to illustrate energy levels of an atom.

Energy versus color , red green and blue LEDs turn on at different voltages

Expanding Afterimages, Look at a bright square then look at its afterimage on backgrounds at varying distances.

Expanding Universe, Use two transparencies to show how everyplace is the center as the universe expands

Expansion of light, when light travels through an expanding universe its wavelength is stretched.

Explore Solar CellsPower and efficiency NGSS

Falling Coins, a moving coins falls at the same rate as one starting at rest.

Falling Dominos, In a line of falling dominos each domino is exponentially bigger than the previous one.

Falling faster than g, some parts of a stretched slinky fall faster than g, some fall slower, and some fall just right.

Falling Rhythm, drop weights spaced along a string and listen to their rhythm.

Feel Temperature, have people line up from hottest hands to coldest.

Feel the Pressure, put your hand in a plastic bag and lower it into water to feel the pressure increase with depth.

Film Can Periodic Table, use pennies in film cans to model atoms in the periodic table.

Film Can Rocket, Baking powder and water create gas which propels this rocket.

Find Fibonacci numbers in plants, count the number of spirals in pineapples, pinecones and artichokes.

Count Fibonacci Numbers in a Pineapple, Use colored pins to mark the spirals of scales on a pineapple, count the spirals, find fibonacci numbers,

Find the highest note, an auditory illusion, use an Exploratorium online exhibit

Finding images, use a large mirror

Finding Images, Straws, find an image made by a Fresnel lens using a straw viewer.

Floaters, observe the inside of your eye.

Floating Coins, Aluminum coins can be "floated" on the surface tension of water.

Floating in Copper, Eddy currents allow you to fly a magnet between two slabs of copper.

Fluorescence vs Phosphorescence, explore the differences between these two forms of luminescence

Flying hydra, electrostatic repulsion flies plastic

Flying tinsel, electrostatic repulsion flies aluminized mylar

Flying Tinsel Pie Plate, fly the tinsel with a charged pie plate.

Force between Two Magnets, The force between two magnets can be measured with a digital scale.

Fractal Paint, One drop of model airplane paint will spread into a circle between two CD jewel boxes and pull into a fractal.

Fresnel lens and laser, trace light rays with a pointer laser

Frictionless CD puck, make an airpuck with a CD and a balloon.

Garden of Magnets mini, Float magnets in a tray and they will form crystal patterns.

Glowing Pickle, A pickle glows in sodium light at 110 volts AC use a GFI for protection.

Gravitational Lens, model the images formed by a gravitational lens produced by a distant galaxy using the base of a wineglass.

Gravity Assist, a simple non-vector calculus example of how a spacecraft gains speed passing around a planet.

Gravity Well, Roll a marble around a correctly shaped funnel and study the orbits of satellites and planets.

Gravity Well Explainer, feel the forces involved in the gravity well experiment.

Gray step , use a gray step postcard to explore this illusion

Green Bananas, Look at a yellow banana image through a form fitting cyan filter and it will look green, use a larger filter and it will look yellow.

Hanging Slinky, study standing waves on a long slinky hung by strings from a heavy cord.

Harmonic Phonecord, resonances of a phonecord.

Head Harp Wrap a string around your head, over your ears, pluck it and listen to the pitch.

Highway Seismometer, measure road bump magnitude with a pen and paper. Model earthquake magnitude.

Hot Hands, have people line up from hottest hands to coldest.

Ice Balloon meanders, Salt on ice balloons creates runoff that carves meandering channels.

Icy Bodies, create comet models using dry ice.

Image on a Mirror, Use a lens to make an image on the surface of a mirror.

Infrared Remote Control, investigate the infrared light from a TV remote control.

Interference, Laser , Shine a laser through two slits to see that Light plus light can equal dark.

Isotope Evaporation  Fill a shallow box with a dozen golf balls and a dozen ping-pong balls shake the box and note the ping pog balls evaporate more quickly.

Isotope Model Make isotope models using magnets.

Laser CD, reflect and diffract a laser beam off a CD to measure the line spacing of the CD.

Laser Light, explore the beam divergence, frequency,polarization and phase of a laser beam.

Laser Milk, shine a laser through a milk solution and observe the changing pattern of scattered light.

Laser speckle, a laser pointer generates speckles which seem to move when you do

Laser Speckle Explanation with ray tracing.

Lava Lamp Sprinkle salt onto a layer of cooking oil floating on water and create convection plumes.

Lego Illusion, the width of the far end of a stack of lego blocks appears to be wider than the near end.

Lens, Image, Real and Virtual Look though a long focal length lens at a distant object and see a real and a virtual image simply by moving your head.

Lightbox, Build a simple lightbox out of a cardboard box.

Light Energy vs Color, find that the voltage necessary to light a blue LED is greater than that for a red.

Liquid Crystal thermometer , Use liquid crystal thermochromic material to show conduction, convection and radiation, evaporation too.

Locating rays, find the rays emanating from a minimag light point source

Mach 1, Explore the shock wave for an object traveling the speed of sound or faster.

Macula, Use a museum exhibit to see your own private shadowy shapes.

Magnetic Accelerator, ball bearings and magnets can be arranged to create great velocity increases.

Magnetic Atmosphere Model, balance five magnets on a pencil and model the atmosphere.

Magnetic Feedback, use a Radio Shack amplifier and pickup to model how a metal detector works.

Magnetic Field of planets, which planets have magnetic fields and why.

Magnet flyer, Fly a magnet between two metal disks.

Magnetic Globe , A toy Earth with a magnet inside has the same magnetic field as the earth.

Magnetic Guide Rail, A slab of aluminum will guide a rolling disk magnet to roll along its center.

Magnetic optical bench, laser pointer mounts.

Magnetic Oscillator, two magnetic oscillators are coupled invisibly by their magnetic fields.

Magnetic Poles , An exploration of the attraction and repulsion of magnetic poles.

Magnetic Push-ups, Use tape to hold one magnet flying over another.

Magnetic Silent Collisions, Collide two magnets on a pencil.

Magnetic Tape, Build a digital tape recorder using bits of cassette tape. Model continental drift.

Magnets 3 vs 1, feel how the magnetic force between two groups of magnets gets stronger as you add more magnets, and bring them closer together.

Magnets Round the Rim, Roll small magnets around a large one to model electric current .

Making Battery Holders, several ways to make a battery holder.

Mars Calendar and Clock, make your own calendar and also a clock for use on Mars.

Mars Size, Explore the size of Mars using clay.

Master eye, Find out if you have a master eye by pointing at a distant object.

Martian water, explore the triple point of water where it freezes and boils at the same time.

Memory , Your memory of things past is not always accurate.

Meters Current, How to use a meter to measure electric current.

Meters Voltage, Use a meter to measure the voltage across a battery

Meters Resistance, Use two meters to measure the voltage across and current through a circuit element.

Metric Prefixes, check out the new metric prefixes, like yocto and Yotta then try the quiz

Mica, Heat mica and it will swell up, this was used as home insulation.

Mirror Pairs, Look at yourself in two square mirrors and notice how the images change as you change the angles between the mirrors.

Mirrors and right-left reversal, Explore what mirrors do, and the meaning of right and left.

Mobius, count the edges and sides on a Mobius strip.

Mobius Collision, collide to Mobius strips and analyze the resulting strip.

Mobius Decay, analyze the products when a Mobius strip fissions.

Mobius Dissection, cut a Mobius strip in half, but first, predict what will happen.

Mobius Space, Move a pattern around a Mobius space and watch it convert from right to left.

Moon illusion, why does the moon look larger on the horizon?

Moon Phases, Use a lamp and styrofoam ball to model the phases of the moon.

Moonwalk, Walk on an inclined plane with assistance from a rope to feel lunar gravity.

Motors Measure the internal resistance and the power used.

MR diagram, graph the mass versus radius of everything in the universe.

Multiplication Blocks, place these blocks side-by-side and they multiply!

Multimeter Electroscope, a digital multimeter can be used to measure the sign of a static electric charge.

Near Hand Far Hand, One hand is twice as far away as the other does it look half as high using 2 eyes? using 1?

Negative TemperaturesUse Poker chips to explore the meaning of negative temperatures .

Neon Tubes, explore electricity with neon glow tubes.

Newton's laws. Simple experiments to explore Newton's laws of motion.

Neutral Buoyancy Create a ball of oil floating in a mixture of water and isopropyl alcohol.

Nose Cone, Look through a cone and notice that depth perception is difficult.

Nuclear Fission, chain reaction human model.

Nuclear Fission, magnetic model.

Ollie Physics, how to make a skateboard follow you up and over by pushing down

Opera Loudness, use a sound level meter to measure the loudness of opera singing.

Opera Acoustics, use a frequency analyzer to look at the frequencies of sung vowels.

Origin of Water Waves, adding oil to water changes the surface tension and smoothes out surface waves made by the wind.

Paper Airplane Science, build a paper airplane, find its center of gravity and pressure, make it stable and controllable, measure its glide ratio.

Partial Eclipse, several methods to allow safe viewing of a partial solar eclipse.

Particle accelerator, Roll a coin around in a balloon to simulate an accelerator.

Pasta Quake, illustrate a magnitude scale of earthquakes by breaking pasta.

Patterns of Nature, A two day workshop on patterns in nature.

Peel a CD, The metal coating under the label of a compact disk can be easily peeled off of some cheap CDs this makes the CD into a diffraction grating.

Pendulum, make a pendulum and find how its period depends on its length.

Pendulum Snake, observe how a set of pendulums moves from order to chaos then back to order again.

Permanent Oil Slick, A layer of nailpolish on black paper makes interference colors.

Phase Pendulum, explore why the sky is blue and the cause of refraction.

Phonecord Harmonics, Explore the frequencies of the harmonics of an oscillating phonecord.

Pinholes 1 versus 3, look though a film can with a single pinhole on one end and three on the other.

Pinhole images, explore your eye and brain and image inversion

Pinhole/Pinshadow Ray tracing shows how an image appears inverted when examined through a pinhole in a filmcan.

Plant Leaf Patterns, a mathematician designs a plant, place leaves around a plant 137.5 degrees apart.

Playdough Moon, Construct a scale model of the earth and moon from playdough.

Polarized light from a laptop computer Use a portable computer liquid crystal display as a source of polarized light.

Polarized Light Model, build a slit out of PVC to model linear polarized light.

Poisson Spot, project the shadow of a sphere and notice a bright point of light in its center.

Positive Afterimages, Look at a brightly lit scene and you can observe a positive afterimage.

Project a Spectrum, Use a diffraction Grating and an overhead projector.

Project a rainbow with a CD: Use a compact disk to project a spectrum onto a shaded wall.

Pump, Film Can, Make a water pump out of a film can.

Quiet Lightning, Explorations at the Exploratorium Exhibit.

Radioactive Decay Model, have a large audience of people flip coins listen to radioactive decay.

Radioactive Decay Math Root, the mathematics of radioactive decay.

Ray Tracing, How to use rays to predict the positions of images made by lenses and mirrors.

Reaction Timer, measure your reaction time with a ruler.

Red/Green Look at colored photos through red and green filters.

Red/Green afterimage, Look at a bright light through red and green filters, one on each eye, then notice the colors in the afterimages.

Reflections on an open end, How does sound bounce off the open end of a tube.

Relative Motion Pendulums, The eye and brain jump into the moving reference frame of a pendulum table and so add two oscillations at right angles.

Relativistic appearance of stars, a series of images

Repel a Grape, Use a strong neodymium magnet to repel a grape which contains diamagnetic water.

Right and Left, explore the meaning of right and left.

Right Left Reversal in a flat mirror., use hands to explore what a mirror does to right and left

Right and Left in 3 different mirrors, what do flat, cylindrical and spherical mirrors do to right and left.

Ringing Aluminum Rod, Explore the resonances of an aluminum rod. Use your fingers.

Saltwater battery, make a battery with salt water, copper wire and aluminum foil.

Scan a laser, Scan a laser pointer into a mirror and notice how the beam bounces off the mirror.

Scan a Laser: Lens, Scan a laser into a lens and notice how the beam bends as it passes through different parts of the lens.

See Electric fields, use fresh dill seed in oil to see electric field direction.

Seeing your retina, Use a small dim light to see your own retina.

See your pupil, use a filmcan with a pinhole in the bottom

Self Centered Globe, Place an earth globe in sunlight and see a model of the sunlight pattern on the real earth.

Simple Inverse Square, use a simple photometer to compare the brightness of one light to four lights.

Size Constancy, The apparent size of an object is determined in part by its perceived distance.

Slinky, falling faster than g

Slinky in hand, explore the different types of waves on a slinky.

Slow waves on a Phonecord, measure the speed of pulses on a stretched phonecord.

Soap driven convection in milk, Food coloring is used to trace surface tension driven convection in milk.

Soap film colors, use a color image to explore soap film colors

Soap film in a can, a soap film across the mouth of a film can

Soap film interference, modeling soap film interference

Solar Brightness, A photometer is used to compare the brightness of the sun to the brightness of a lightbulb.

Solar Cells, measure the power produced by a solar cell.

Solar Thermal Energy, measure the power of the sun using a liquid crystal thermometer.

Solid, Liquid, Gas, A thought Experiment exploration of the nature of these phases.

Sound Circles, Model the doppler effect using circles traced on transparency film.

Sound Column, Explore sounds in a long concrete tube at the Exploratorium.

Spectra Explorations, Use a diffraction grating or spectrometer to look at spectra of common light sources.

Spectra CD introduction, Reflect sunlight onto a white paper in a shadow.

Spectra reflected in a CD, look at a light source reflected in a CD to see a spectrum

Spectrometer CD, build a spectrometer with a compact disk.

Spin a Koosh, Model the equatorial bulge of the earth by spinning a koosh ball.

Spinning Cylinder. Explore the stable patterns produced by a spinning PVC cylinder.

Spoon Rattleback, Make a rattleback by bending a spoon.

Spring Scales, Explore the readings on two springs scales when they are hooked together.

Stocking Force Visualization, The stretch on a stocking shows the force it is exerting.

Straw Oboe, Straw Oboe How to make a straw oboe, how shorter lengths make higher pitches.

String Crossing, Stretch a string in front of you, what do you see an X or V?

Stroop Effect: Name the color of the "ink" a word is printed with, when the word names a different color. This is a surprisingly difficult task.

Styrofoam Airplane, Turn a Styrofoam plate into a stable airplane one step at a time.

Sugar Cube in Oil, drop food coloring onto a sugar cube in cooking oil.

Supercooled Water, Place water drops on a plastic surface then place them into a freezer to supercool them, touch them with a seed crystal and they crystallize rapidly.

Supercooled Water Balloon, Freeze a water balloon then drip water drops onto the cold ice and watch them freeze.

Swing a Blinky , persistence of vision using moving AC neon lights

Syphon, make water flow uphill.

Tape Electromagnetic Wave, wiggle charged tapes back and forth and send and receive radio waves.

Tape electroscope, using sticky tape as an electric charge detector

Temperature Illusion, touch a cold glass of water with one hand and a hot glass with the other them try to sense the temperature of a room temperature glass. Each hand will sense a different result.

Temperature sensing, Feel the temperature of other people's hands.

Terminal Velocity, Drop basket type coffee filters and find their terminal velocity.

Tides, use dancing people and models drawn on transparencies to model the tides.

Tide Gravity, use a gravity well to model the tides.

Transit of Venus, learn how observations of Venus moving across the face of the sun led to the measurement of the Astronomical Unit, the size of the solar system.

Turning in air, How can a person in freefall turn around while initially at rest?

Two Head Harp, Wrap a string around the 4 ears of two people facing each other, share the music.

Two slit interference model, draw sinewaves on white cards and investigate interference.

Universe City size, Map the entire universe onto 14 city blocks.

Universe City time, Take a walk down a street where light travels 1 block per decade.

Vacuum Bottle Collapse, use a vacu-vin to pump the air out of a stiff plastic bottle, sudden buckling results, whomp.

Vertical Slinky, Model resonances of a tube open at one end and closed at the other.

Voltage, Use a meter and a battery to measure voltage and explore its meaning.

Water Cycle Video, watch the water cycle video by Andrej Zdravic and write a narration for it.

Water Glass, A stiff piece of paper holds water in an inverted glass.

Waterwaves, Measuring the period, and wavelength of an ocean wave to get its speed.

Water Wave Video, watch the wave video by Andrej Zdravic.

Waves Analog Versus Digital Compare signals sent by analog and digital encoding along a spring as waves.

Weight Illusion, The perceived weight of an object depends on its perceived size.

Where's North? , Hang several magnets and they all line up!

Whirly, the sound from a twirled corrugated tube

Whirly 2, a second version of the whirly lesson.

Wire Model of Voltage, use chenille stems to model voltage around a circuit.


Math Roots

Angular Size, the definition of the angular size of an object in radians and degrees.

Bicycle Gear Ratios, explore the mathematics of bicycle gears.

Cardiod, use magnets to draw a cardiod

Doppler The mathematics relating the frequency heard by a moving observer or a moving source of sound.

Frequency, the relationship between frequency and period.

Frequency of the fundamental, How the frequency of the fundamental oscillation of a spring depends wave speed and length.

Frequencies of the Harmonics, harmonics have frequencies which are integer multiples of the fundamental.

Glide Ratio, measure the glide ratio of a paper plane.

Gray step, a digital model of lateral inhibition.

Interference, calculate the angles of the minima from 2 slits

Model Fibonacci numbers in plants, create a model of plant growth and see if it produces Fibonacci numbers of spirals.

Pendulums, find out how the period of a pendulum depends on its length, and other factors.

Pinhole, Optimum size, Find the best size for a pinhole.

Planet Shape How to add rotationally symmetric basic shapes to create the shape of a planet.

Playdough Moon, Construct a scale model of the earth and moon from playdough.

Refraction, trace light through layers.

Relativity Television, Consider the time and space measured by an electron in a television.

Rotation of the Earth, Observe the motion of the sun and stars and discover that the solar and sidereal days have different lengths.

Speed of a wave, measure the speed of a pulse on a phonecord.

Speed of a wave vs. tension and density, calculate the speed of a wave in a phone cord based on its tension and density.

Spirograph, use spirographs to investigate greatest common divisors, modular mathematics, and art.

Waterwaves, Measuring the period, and wavelength of an ocean wave to get its speed.


Bouncing ball, A ball bouncing on a steel plate.

Doppler sound from a car horn.

Webcast Activities

Weather Now, How we know what the climate is doing now.

Weather Past, explore the climate record

Weather Future, predict the future climate.

Museum Exhibit Explorations

Climate Explorer, Explore the Exploratorium's award winning website on climate.

Cloud photos, look at images of clouds on the Exploratorium's image database.

Cold Spot, A 2 meter diameter mirror is used to make an image of a block of dry ice, does the image feel cold? This is a variation of the Hot Spot Exhibit at the Exploratorium.

Exploratorium Weather Station, Explore the data available from the Exploratorium's online weather station.

Light Island, Explore how images are formed by passing light rays through a lens and bouncing them off mirrors.

Turbulent Orb Exploration, Explore laminar and turbulent flow at the turbulent orb exhibit.

Wave Machine Send waves down this set of torsionally coupled rods and watch standing waves form.

Lecture Performances

Northern California AAPT, a selection of my best exhibits.

History of Magnetism, 2002 Technorama, a lecture performance.

Good Vibrations, March 2000, Technorama, a lecture performance about vibration.

Playing the Whirly in Kansas City, My 5 minute whirly performance competition.

Playing the Whirly in San Francisco, I accompany Sarah Hopkins by playing the Whirly.

Playing the Whirly at the AAAS, the lecture and science notes together.

RAFT dinner, Eric Muller and I use simple materials to teach physics at the dinner table.

The Three Moons of Earth, Costa Rica 2003

AAPT Electricity 2001, Blow out a toaster, make a pickle glow, and more.

Lecture Master List, a list of topics which I use in lectures.


3 Forces, some recent observations of the forces of nature.

Aerodynamic Thoughts, Flying things and Bernoulli versus Newton.

Analemma, the motion of the sun across the sky for a day and a year. With Pat Murphy.

BackEMF in a spinning motor.

Color Algebra, the mathematical addition and subtraction of colors.

Counting Calories, An article from Exploring Magazine on how scientists measure the calorie content of foods.

General Relativity at Home, and article from the Magazine of Fantasy and Science Fiction.

On Bernoulli, thoughts on why airplanes fly.

How the Retina Works, the gory chemistry details.

Pinhole String Model, use string to trace the path of light through a pinhole.

Playing the Whirly in Kansas City, I compete in the science demonstrators competition.

Playing the Whirly in San Francisco, I play music professionally, one note only.

Polar Bear Fur is not a fiber optic, an electron microscope cross section of polar bear fur.

Popular Errors, Urban legends of Science. Glass is not a liquid. Bernoulli and airplanes, Candle in a jar pulls up water as oxygen burns. Car tires protect the car from lightning.

Why is the sky blue? And other answers about color from scattered light, by ice, clouds, and more.

Light is? Maxwell A quick outline of Maxwell's view of light as an electromagnetic wave.

Light is? Quantum A quick outline of Schroedinger's view of light as a wave in probability amplitude.

Nuclear Fission an overview

On Models of Elecricity, current as the flow of positive and negative charges.

Square of Electricity, Force fields, electric fields, electrical potential energy and electrical potential and how they are connected.

Reflections on an open end, why sound reflects from an open end.

Green Flash, Photos and explanations of the green flash, including a violet flash from Bill May.

Twilight Arch, Photos and a description of the Twilight arch.

Twisted Thinking, an article on Mobius strips from the Magazine of Fantasy and Science Fiction.

What is science?, stories of science good and bad

What is Temperature? Some of the earlier definitions of temperature.

image list

The harmonics of a Whirly, the density and motion of air in a tube open at both ends.

Whirly Movie, the time dependence of the motion of air in the fourth harmonic resonance of a tube open at both ends.

Scientific Explorations with Paul Doherty

© 2002

10 July 2002