﻿ In an X-ray tube, electrons accelerated through a very high potential difference strike a metal target. If the potential difference is increased, the speed of the emitted X-rays   : Kaysons Education

# In An X-ray Tube, Electrons Accelerated Through A Very High Potential Difference Strike A Metal Target. If The Potential Difference Is Increased, The Speed Of The Emitted X-rays

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X-rays, being electromagnetic waves, always travel with the speed of light i.e.,  in vacuum. It is only the energy of the incident electrons (and, therefore, the energy of the emitted X-rays) that depends on the accelerating p.d. The speed of X-rays has nothing to do with this p.d., it is a characteristic only of the medium of propagation. Unlike the case of visible light, the speed of X-rays changes but little with a change in medium (the refractive index of different media for X-rays is very close to unity)

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