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The energy reveived from the sun by the ...

The energy reveived from the sun by the earth and surrounding atmosphere is 2 cal`cm^(-2)` `min^(-1)` on a surface normal to the rays of sun.
Q. What is the total energy radiated, in J `min^(-1)`, by the sun to the universe? Distance of the sun from the earth is `1.49xx10^(11)`m.

A

`2.3444xx10^(28)J"min"^(-1)`

B

`2.33xx10^(24)J"min"^(-1)`

C

`2.34xx10^(20)J"min"^(-1)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
The area of surface surrounding sun at a distance equal to earth distance `4pid^2`
Energy raditad by sun (in J `"min"^(-1))` is
`2xx4.2[4pi(1.49)^2xx10^(26)]`J`"min"^(-1)`
`=2.3444xx10^(28)` J `"min"^(-1)`
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