krisknox9180 krisknox9180

15-03-2024
Physics

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The momentum of light is exactly reversed when reflected straight back from a mirror, assuming negligible recoil of the mirror. Thus the change in momentum is twice the photon momentum. Suppose light of intensity 1.29 kW/m² reflects from the entire surface of a mirror of area 2.60 m².

Calculate the energy (in J) reflected in 1.00 s.

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