A laser used to weld detached retinas emits light with a


A laser used to weld detached retinas emits light with a wavelength of 654nm in pulses that are 20.2ms in duration. The average power expended during each pulse is 0.605W .

A) How much energy is in each pulse, in joules?

B) How much energy is in each pulse, in electron volts?

C) What is the energy of one photon in joules?

D) What is the energy of one photon in electron volts?

E) How many photons are in each pulse?

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Physics: A laser used to weld detached retinas emits light with a
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