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(b) From your answer to (a), guess what order of accelerating voltage (for electrons) is required in such a tube?
Asked by Sarala Last Modified
Answer 
Harshit Bhardwaj
(a) Wavelength produced by an X-ray tube, 
Planck’s constant, h = 6.626 × 10−34 Js
Speed of light, c = 3 × 108 m/s
The maximum energy of a photon is given as:
Therefore, the maximum energy of an X-ray photon is 27.6 keV.
(b) Accelerating voltage provides energy to the electrons for producing X-rays. To get an X-ray of 27.6 keV, the incident electrons must possess at least 27.6 keV of kinetic electric energy. Hence, an accelerating voltage of the order of 30 keV is required for producing X-rays.
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