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wikidrox
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I do not know how to do the second part of this question. I never learned this.
A laser used to weld detached retinas puts out pulses of 640 nm light, 25 ms long, which average 0.50 W output during a pulse.
i) how much energy can be deposited pre pulse?
ii) If the energy of a light particle (photon) is about 3 * 10^-19 J, how many photons does each pulse contain?
I do not know how to get this.
A laser used to weld detached retinas puts out pulses of 640 nm light, 25 ms long, which average 0.50 W output during a pulse.
i) how much energy can be deposited pre pulse?
ii) If the energy of a light particle (photon) is about 3 * 10^-19 J, how many photons does each pulse contain?
I do not know how to get this.