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n' photons of wavelength 'lamda' are abs...

n' photons of wavelength `'lamda'` are absorbed by a black body of mass 'm'. The momentum gained by the body is

A

`(h)/(mlamda)`

B

`(mnh)/(lamda)`

C

`(nh)/(lamda)`

D

`(nh)/(lamda)`

Text Solution

Verified by Experts

The correct Answer is:
D
(d) : Energy of n photons, `E=(nhc)/(lamda)`
Momentum gained by the body, `P=(E)/(c)=(nhc)/(lamdac)=(nh)/(lamda)`
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