A photon of wavelength 2 is incident on a free electron at rest and is scattered in the backward direction. the functional shift in its wavelength in terms of t

A photon of wavelength 2 is incident on a free electron at rest and is scattered in the backward direction. The functional shift in its wavelength in terms of the Compton wavelength Ac of the electron is, Q9. 3hc (a (c) 2 (d) b) 3 21