Q.

Comparing the masses of the two photons, of red light and violet light

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a

The mass of photon of violet light may be greater or smaller than the mass of the red light depending upon the surrounding conditions

b

The mass of photon of violet light is less than the mass of red light

c

The mass of the photon of violet light is greater than the mass of the red light

d

The mass of photon of violet light is equal to the mass of red light

answer is A.

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Detailed Solution

According to Einstein’s equation mass of a photon is given by the relation
E=hϑ=mc2 

m=hϑc2 or m  ϑ
Since frequency of violet  light photon is greater than the frequency of red light photon.
Mass of violet photon is greater than the mass of red photon.

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