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Two source of light emit X - rays of ...

Two source of light emit X - rays of wavelenght 1 nm and visible light of wavelength 500 nm respectively . Both the source emit light of the same power 200 W. The ratio of the number density of photons of X - rays to the number density of photons of the visible light of the given wavelengths

A

`(1)/(250)`

B

250

C

500

D

`1/(500)`

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