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At a distance of 105km from a light source that emits light of wavelength 857nm uniformly...

At a distance of 105km from a light source that emits light of wavelength 857nm uniformly in all directions, the intensity of the light is 474MW/m2. The light is incident normally on a reflecting rectangular object with an area of 199m2. In a time interval of 23.3ms how much momentum is transferred to the object(in kg*m/s).

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