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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…
NEET UG 2013 — Physics Optics
2013mcqmedium
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, then which of the following statements is correct?
Official previous-year question
Held on 30 Apr 2013 · Verified 9 Jul 2026.
Options
- A
Diffraction pattern is not observed on the screen in the case of electrons
- B
The angular width of the central maximum of the diffraction pattern will increase
- C
The angular width of the central maximum will decrease
- D
The angular width of the central maximum will be unaffected
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