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The intensity of solar radiation of the ...

The intensity of solar radiation of the earths surface is `1KWm^(-2)`. The power entering the pupil of an eye of diameter `0.5 cm` is

A

39.2 mw

B

19.6 mw

C

9.8 mw

D

4.9 mw

Text Solution

Verified by Experts

The correct Answer is:
B
`P = IA = I pi R^(2)`
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NARAYNA-ELECTROMAGNETIC WAVES -EXERCISE -2(C.W)
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