Question

For Compton effect with visible light the observed Compton shift is

• A. Very large because the electrons appear free
• B. Very small because the electrons appear free
• C. Is almost zero because the electrons appear bound
• D. Less than zero

Answer 1

Answer: (C)

Is almost zero because the electrons appear bound

In compton scattering it is necessary that the energy of the photon should be very much greater than binding energy of electron. Binding energy is equal to work function of metal. In most of metals, the threshold frequency is equal to that of ultravoilet light that is why we do not observe comption effect with visible light.