Physics · Wave Optics

A parallel beam of fast-moving electrons is incident normally on a narrow slit, and a fluorescent screen is placed at a large distance. If the speed of the electrons is increased, how will the angular width of the central maximum change?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1The angular width of the central maximu m will remain unaffected.
2The angular width of the central maximum will decrease.✓
3The angular width of the central maximum of the diffraction pattern will increase.
4No diffraction pattern is observed on the screen in the case of electrons.

Correct answer

The angular width of the central maximum will decrease.

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