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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Wave Optics

Olympiad workbook · NSEP · Wave Optics

Select the correct statement(s), out of the following, about...

Select the correct statement(s), out of the following, about diffraction at N parallel slits.

Options

AThere are ( $\mathrm{N}-1$ ) minima between each pair of principal maxima.
BThere are (N-2) secondary maxima between each pair of principal maxima.
CWidth of principal maximum is proportional to $1 / \mathrm{N}$ .
DThe intensity at the principal maxima varies as $\mathrm{N}^2$ .

Correct answer

D. The intensity at the principal maxima varies as $\mathrm{N}^2$ .

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