Message-Id: <l03020900b0674bad3d7a@[206.170.177.93]>
In-Reply-To: <v02140b01b05f94bf89cb@[136.152.2.65]>
Date: Sun, 12 Oct 1997 20:56:47 -0700
To: pinhole@exploratorium.edu
From: kathy saito <ksaito@foothill.net>
Subject: laser pointers
Hello fellow pinholers:
One of my 9th grade Physical Science students asked me a question the other
day that I couldn't answer. Am hoping one of you could help me out. We
were talking about apparent vs. absolute magnitude of a star and how
apparent magnitude is dependent on distance from the observor. This
student has observed how a laser beam from a laser pointer (I think that's
what they're called...those pen-like things that people use as pointers in
presentations) seems to have the same brightness when it's 5 ft away and
when it's 50 ft away. He wanted to know why this was. Thanks!
kathy saito
physical science/chem teacher
folsom high school
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QUOTE OF THE WEEK: "You never know when you're making a memory" - Rickie
Lee Jones (do you all remember the "memory" she's referring to?! If you're
a Generation Xer, you should!)
VERSE OF THE WEEK: "I am the way and the truth and the life. No one comes
to the Father except through me. If you really knew me, you would know my
Father as well. From now on, you do know him and have seen him." - John
14: 6-7
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