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Class 12 NEET Physics Optics Questions Part 1

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Question : 25

Total: 100

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 NEET)

The angular width of the central maximum will decrease
The angular width of the central maximum will be unaffected.
Diffraction pattern is not observed on the screen in the case of electrons.
The angular width of the central maximum of the diffraction pattern will increase

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