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A small circular disc is placed in the path of light from a distant source. Identify the nature of the fringe produced.

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in Physics – Class 12 by (135k points)
A small circular disc is placed in the path of light from a distant source. Identify the nature of the fringe produced.

(a) Dual

(b) Narrow

(c) Dark

(d) Bright

This question was posed to me in final exam.

Question is from Wave Optics in section Wave Optics of Physics – Class 12

1 Answer

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Best answer
Correct choice is (d) Bright

Explanation: Waves from the distant source are diffracted by the edge of the disc. These diffracted waves interfere constructively at the center of the shadow and produce a bright fringe. Therefore, the nature of the fringe produced is bright.

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