What are the average and maximum lifespans of a photon?
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M$3 Answers
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M$http://www.ee.buffalo.edu/faculty/cartwright/java_applets/cavity/photon_lifetime/index.html
-The photon lifetime is a time constant that describes the decay (or the growth) of energy in a cavity. We can calculate the photon lifetime by considering the rate equation (a differential equation with time as the independent variable) for the decay of an initial bunch of photons, Np, in the cavity. The applet IN THE ABOVE LINK shows a simple two mirror cavity with a pulse of photons bouncing back and forth.
Interesting article - http://blogs.zdnet.com/emergingtech/?p=517
The Nature of Light: What is a Photon? (Optical Science and Engineering), by Chandra Roychoudhuri
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M$I think my red bull is kicking in!
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M$I'm hoping that Red Bull kicks in again soon. If you believe 6 months is a legitimate answer, I would love to see the sources that helped you figure that out. I can't vote you as unhelpful because the comment did help me get a chuckle. I just imagined you there typing away a million miles an hour with 50 cans of Red Bull littered around the computer. Quite a funny image, so I couldn't blame you for the quick answer.