The energy flux of sunlight reaching the...

The energy flux of sunlight reaching the surface of the earth is `1.388 xx 10^(3) W//m^2` . How many photons (nearly) per square metre are incident on the Earth per second? Assume that the photons in the sunlight have an average wavelength of 550 nm.

`2.51xx10^(31)`

`3.84xx10^(31)`

`1.51xx10^(31)`

`7.51xx10^(31)`

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AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-EXERCISE=II

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