Assertion : `X` - rays travel with the speed of light.
Reason : `X`- rays are electromagnetic rays.

Assertion (A): X-ray travels with the speed of light. Reason (R): X-ray is an e.m. wave.

gamma-rays travel with the speed of _________.

Assertion : The phenomenon of X - ray production is basically inverse of photoelectric effect. Reason : X - rays are electromagnetic waves.

A: The nature of the characteristic X -rays does not depend on accelerating potential. R: X- rays are electromagnetic radiation.

A: The nature of the characteristic X -rays does not depend on accelerating potential. R: X- rays are electromagnetic radiation.

Assertion : X - rays cannot be diffracted by means of grating . Reason : X - rays does not obey Bragg's law.