A laser used to weld detached retinas puts out 25-ms-long
Chapter 28, Problem 41(choose chapter or problem)
A laser used to weld detached retinas puts out 25-ms-long pulses of 640-nm light which average 0.68-W output during a pulse. How much energy can be deposited per pulse and how many photons does each pulse contain? [Hint: See Example 274.]
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