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How many photons are received on earth p...

How many photons are received on earth per `cm^-2` per hour if the energy from the sun reaching on the earth is at the rate of `2cal cm^(-2) min^(-1)` and average wavelength of solar light be taken as 5500Å. Use `h=6.6xx10^(-34)J , c=3xx10^8ms^(-1)` and `1cal =4,2J`

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