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Energy from the sun is recived on earth ...

Energy from the sun is recived on earth at the rate of `2` cal per `cm^(2)` per min. If avergae wavelength of solar light be taken at `5500 A` then how many photons are recived on the earth per `cm^(2)` per min ?
`(h =6.6 xx 10^(-34)J-s, 1cal = 4.2J)`

A

`1.5 xx10^13`

B

`2.9 xx10^13`

C

`2.3xx10^19`

D

`1.75 xx10^19`

Text Solution

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The correct Answer is:
C
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