Date: Fri, 17 Dec 2010 14:06:07

Author: Thomas Senior

Subject: Re: Violet laser pointers and stimulated emission

Post:

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Maybe you lecture to pit vipers?

Tom



________________________________
From: William Maddox
To: tap-l@lists.ncsu.edu
Sent: Fri, December 17, 2010 11:47:37 AM
Subject: Re: [tap-l] Violet laser pointers and stimulated emission

From: WC Maddox

What do you point at with an IR laser pointer? Do you wear night vision
goggles?

End Message



On 12/16/2010 11:33 PM, Kenn Lonnquist wrote:
It should be local heating; you can do the same with a red laser pointer
(or any bright light with less energy then blue light). It is
particularly cool to use anIR laser pointer, or an IR led light to heat the
glowing paper; you can see the paper get bright as you force the paper to
give up it's energy, then it goes dark. Friction will heat the surface
enough too, but an IR laser pointer is a step up on the coolness scale.
>
>




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Maybe you lecture to pit vipers?TomFrom: William Maddox To: tap-l@lists.ncsu.eduSent: Fri, December 17, 2010 11:47:37 AMSubject: Re: [tap-l] Violet laser pointers and stimulated emission








From: WC Maddox

What do you point at with an IR laser pointer? Do you wear night
vision goggles?

End Message



On 12/16/2010 11:33 PM, Kenn Lonnquist wrote:
It should be local heating; you can do the same with a
red laser pointer (or any bright light with less energy then blue
light). It is particularly cool to use an IR laser pointer,
or an IR led light to heat the glowing paper; you can see the
paper get bright as you force the paper to give up it's energy,
then it goes dark. Friction will heat the surface enough too, but
an IR laser pointer is a step up on the coolness scale.











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