How many photons are striking the surface every second

Reference no: EM13986597

A blue laser that operates at a wavelength of 442 nm is directed at a black surface, which completely absorbs the beam. If the laser exerts a force of 96 nN(9.6 multiply.gif 10-8 N) on the surface, how many photons are striking the surface every second?

Reference no: EM13986597

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