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Old 06-05-2012, 10:13 PM #1
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Default How a laser works

I saw this video on YouTube today, it's an easy to digest video. Thought some of you may be interested.




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Old 06-05-2012, 10:21 PM #2
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Default Re: How a laser works

^^ Could you check the link please? I don't see a video.

-thanks
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Old 06-05-2012, 10:26 PM #3
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Default Re: How a laser works

Quote:
Originally Posted by Moebius View Post
^^ Could you check the link please? I don't see a video.
Whoops, I missed a letter at the end of the video URL.

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Old 06-06-2012, 12:33 AM #4
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Default Re: How a laser works

Repeated flashes aren't required for pumping ruby.

To clarify, when he says "...more electrons in the energy level just above the ground state than in the ground state..." he means "more atoms in an excited state." In any laser that I'm aware of, most electrons will be in the ground state.
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Old 06-07-2012, 02:01 PM #5
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Default Re: How a laser works

don't "excited atoms" have electrons in higher energy shells, with "gaps" in the lower shells that they had previously resided in? As I understand it, the electron sheds that energy it used to jump to the next shell as a photon when it drops down to a lower energy shell, with the ev of that jump determining what wavelength the photon ends up being. my understanding is kinda cloudy

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