Q.

The mass of a photon of wavelength λ is given by _____.

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a

hλc

b

hλc

c

hλc

d

hcλ

answer is B.

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Detailed Solution

Energy of photon of frequency ν is given by

      hν=mc2 hcλ=mc2               c=vλ 

Hence,  m=hλc

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