A laser used to weld detached retinas puts out 31, Ask an Expert

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A laser used to weld detached retinas puts out 31 milliseconds long pulses of 640 nanometers light which average 0.71 Watt output during a pulse.

a) Obtain how much energy can be deposited per pulse?

b) Obtain how many photons does each pulse contain?

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Reference No.:- M91226608

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