EvC Forum: General Relativity.

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Topic: General Relativity.

Ben!

Member (Idle past 1428 days)

Posts: 1161

From: Hayward, CA

Joined: 10-14-2004

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Message 17 of 129 (244700)
09-18-2005 8:27 PM

Light and Energy

This may be a quantum question, and not GR, but I'll ask and see. GR's always using light, so...

If the frequency of light is really just a statement about it's probability amplitude, then how is it that light's energy is related to it's frequency? It seems pretty straightforward to say that light's energy is then related to it's probability amplitude (and how often that little complex vector is spinning). Why would faster spinning of that little vector mean higher energy?

Thanks!
Ben

Replies to this message:
	Message 23 by 1.61803, posted 09-21-2005 2:39 PM	Ben! has not replied
	Message 63 by JustinC, posted 09-30-2005 6:09 PM	Ben! has not replied

Ben!

Member (Idle past 1428 days)

Posts: 1161

From: Hayward, CA

Joined: 10-14-2004

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Message 29 of 129 (246548)
09-26-2005 12:53 PM

Reply to: Message 28 by RoyLennigan
09-26-2005 12:34 PM

Re: Light and Energy

Roy,

There are two concepts of intensity; one is independent of US, independent of our ability to SEE the light with our very own eyes. That is the sense in which intenisity is being used here (we are, after all, talking physics here). You're talking PSYCHOPHYSICS. PSYCHOPHYSICS is different, Roy. This thread is not about General Relativity in Psychophysics. It's about General Relativity.

Light intensity - Wikipedia
Psychophysics - Wikipedia

With that said, Ned got this wrong:

The intensity of light is a measure of the number of photons arriving in unit time.

The intensity of light is a measure of the the number AND ENERGY of photons arriving in unit time. At least, as far as I can tell.

Anyway, let's drop it. The original question still stands; all these mistakes and corrections simply obscure it. Let's talk some real physics!

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	Message 28 by RoyLennigan, posted 09-26-2005 12:34 PM		RoyLennigan has replied

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	Message 31 by RoyLennigan, posted 09-26-2005 8:20 PM		Ben! has not replied

Ben!

Member (Idle past 1428 days)

Posts: 1161

From: Hayward, CA

Joined: 10-14-2004

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Message 55 of 129 (247510)
09-30-2005 1:38 AM

Reply to: Message 54 by JustinC
09-30-2005 1:25 AM

Page Redirection

You can listen to the lectures yourself online. Even if you guys just listen to the first one, you'll be all set.

Justin, any chance you can take a peek at my original message at Message 17?

Thanks,
Ben

I don't want a large Farva, I want a goddamn liter-a-cola.

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	Message 54 by JustinC, posted 09-30-2005 1:25 AM		JustinC has not replied

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	Message 58 by madeofstarstuff, posted 09-30-2005 1:24 PM		Ben! has replied

Ben!

Member (Idle past 1428 days)

Posts: 1161

From: Hayward, CA

Joined: 10-14-2004

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Message 59 of 129 (247672)
09-30-2005 1:29 PM

Reply to: Message 58 by madeofstarstuff
09-30-2005 1:24 PM

Re: Lectures

Sure. Unfortunately, this topic has little to do with General Relativity. Maybe we should open up a new topic on quantum mechanics and quantum electrodynamics where we can discuss things like the nature of light.

I'm definitely glad to hear you're enjoying the lecture!

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	Message 58 by madeofstarstuff, posted 09-30-2005 1:24 PM		madeofstarstuff has not replied

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