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The energy flux of the sunlight reaching...

The energy flux of the sunlight reaching the surface of the earth is `1.388xx10^(3) W m^(-2)`. How many photons (nearly) per square meter are incident on the earth per second? Assume that the photonsin the sunlight have an average wavelength of 550 nm.

A

`3.838xx10^(21) "photon "m^(-2)s^(-1)`

B

`3.838xx10^(23) "photon "m^(-2)s^(-1)`

C

`5.838xx10^(21) "photon "m^(-2)s^(-1)`

D

`5.838xx10^(23) "photon "m^(-2)s^(-1)`

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The correct Answer is:
A
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