When an electron moving at a high speed strikes a metal surface, which of the following are possible?
(i) The entire energy of the electron may be converted into an X-ray photon
(ii) Any fraction of energy of the electron may be converted into an X-ray photon
(iii) The entire energy of the electron may get converted to heat
(iv) The electron may undergo elastic collision with the metal surface

Options

A. the entire energy of the electron may be converted into an X-ray photon
B. any fraction of the energy of the electron may be converted into an X-ray photon
C. the entire energy of the electron may get converted to heat
D. the electron may under go elastic collision with the metal surface.

Answer

A, B, C, D

Explanation

the electron will not undergo elastic collision with the metal surface