A parallel beam of fast moving electrons is incident normally
on a narrow slit. A fluorescent screen is placed at a
large distance from the slit. If the speed of the electrons is
increased, which of the following statements is correct ?
[2013]
(a) The angular width of the central maximum of the diffraction
pattern will increase.
(b) The angular width of the central maximum will decrease.
(c) The angular width of the central maximum will be unaffected.
(d) Diffraction pattern is not observed on the screen in
case of electrons.
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