Characteristic X-rays are produced due to

Options

A. Transfer to momentum in collision of electrons with target atomss
B. Transition of electron from higher to lower electrons orbits in an atom
C. Heating of the target
D. Transfer of energy in collision of electrons with atoms in the target.

Answer

B

Explanation

When the high energy electrons hits the target and takes out an elelctron from the inner orbit, there is a possibility of an outer electron to fall down to fill up that vacancy. And when such a transition of electron takes place from a higher energy level to a lower energy level, the difference of energy between the two levels is given off in the fomr of radiation known as characteristics X- rays.