From: David Lauter (dyakov@ix.netcom.com)
Date: Mon Oct 16 2000 - 23:16:06 PDT
From: "David Lauter" <dyakov@ix.netcom.com> Subject: Re: Pinhole Digest #486 - 10/13/00 Date: Mon, 16 Oct 2000 23:16:06 -0700 Message-ID: <01c03801$bc50ab60$24e76ed1@dyakov.ix.netcom.com>
I had some good questions today from my ninth graders. We were playing with
slinkies during a beginning lesson on light and suddenly I get these three
questions which immediately made me want to ask for HELP!:
"How is it possible to determine the frequency or the wavelength of light?
(I know you must use Planck's constant, so I suppose a good answer would be
to explain how Planck figured out his constant. )"
"If all light in empty space travels at the same speed what happens when
light falls into a black hole? Doesn't it go faster and faster?"
And finally,
"But the light can't come out of a black hole so it must stop. Does light
stop in a black hole?"
David Lauter
Washington High
This archive was generated by hypermail 2b29 : Tue Oct 16 2001 - 12:21:58 PDT