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If the distance between the two slits is doubled, the fringe width _________

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If the distance between the two slits is doubled, the fringe width _________

(a) Doubles

(b) Halves

(c) Four-times

(d) Remains same

The question was asked in a job interview.

I would like to ask this question from Young’s Experiment in division Interference of Engineering Physics II

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The correct choice is (b) Halves

For explanation: The fringe width is inversely proportional to the distance between the two slits. As the distance between the slits doubles, the fringe width becomes half of its original value.

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