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Radiant energy from the Sun arrives at Earth with an intensity of 1.5 kW/m. Making the rough approximation that all photons are absorbed, find

  

Radiant energy from the Sun arrives at Earth with an intensity of 1.5 kW/m. Making the rough approximation that all photons are absorbed, find (a) the radiation pressure and (b) the total force experienced by Earth due to this "solar wind". [Hints: The rate of total photon momentum absorbed by the earth is the total pressure force exerted on the Earth by the solar wind, by Newton's 2nd Law: dp/dt = F .]

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