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Q.

Choose the incorrect statement from the following options.

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a

Inertial mass of a photon is  hνc2.

b

Photocells converts change in intensity of illumination into change in photo current

c

In Compton effect, the energy of the incident photons is completely absorbed by the electrons, similar to photoelectric effect.

d

Both (a) and (c)

answer is A.

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Detailed Solution

In Compton effect, scattered photon has less energy than that of incident photon. The energy lost by the photon is taken by the electron as kinetic energy.
Thus, in Compton effect only a part of energy of incident photon is absorbed by the electron but in photoelectric effect, the energy of incident photons is completely absorbed by the electrons.

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