Question

Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10⁻¹¹ m. The accelerating voltage for electrons in X-ray machine should be(a) < 124 kV(b) > 124 kV(c) between 60 kV and 70 kV(d) = 100 kV

Answer 1

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Quetion :- Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10⁻¹¹ m. The accelerating voltage for electrons in X-ray machine should be

Answer :- > 124 kV

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Answer 2

Answer:

(a) < 124 kV

Explanation:

Minimum Wavelength = 10⁻¹¹ m (Given)

From the conservation of energy, the kinetic energy of electron will equal the maximum photon energy, here we will neglect the work function o because it is normally so small as compared to the eV0.

Therefore, eV0 = hvmax or

eVo = hc/λmin

Vo = hc/eλmin or

Vo = 12400×10−10/10⁻¹¹

Vo = 124kv

Therefore, the accelerating voltage for electrons in X-ray machine should be less than 124kv