Question

The wavelength of a photon needed to remove a proton
from a nucleus which is bound to the nuclear with 1 MeV
energy is nearly
(a) 1.2 nm (b) 1.2 × 10⁻³ nm
(c) 1.2 × 10⁻⁶ nm (d) 1.2 × 10 nm

Answer 1

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Answer 2

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