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A substance absorbs electromagnetic radi...

A substance absorbs electromagnetic radiations of wavelength 12.3 nm and then emits another electromagnetic radiations of wavelength 24.6 nm . If ratio of number of photons absorbed to number of photons emitted is `2:1` then ratio of energy absorbed to energy emitted will be :

A

`2:1`

B

`1:1`

C

`4:1`

D

`1:4`

Text Solution

Verified by Experts

The correct Answer is:
C
`(E_("absorbed")=n_(ab)xx1240/12.3)/(E_("emitted")=n_(em) xx1240/24.6)`
`=2/1xx24.6/12.3=49.2/12.3`
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