Interference and diffraction — CSIR Net PYQ (Question 1)

A Interference and diffraction previous-year question (PYQ) from Optics (CSIR Net). Read the question, check the correct answer, then practise the full topic.

Question 1 of 15 · 3.5 marks

A screen has two slits, each of width $w$, with their centres at a distance $2w$ apart. It is illuminated by a monochromatic plane wave travelling along the $x$ -axis. The intensity of the interference pattern, measured on a distant screen, at an angle $\theta =n\lambda /w$ to the $x$ -axis is

1. 1zero for $n=1,2,\mathrm{3...}$
2. 2maximum for $n=1,2,\mathrm{3...}$
3. 3maximum for $n=\frac{1}{2},\frac{3}{2},\frac{5}{2}...$
4. 4zero for $n=0$ only

Correct answer: Option 1

About this question

This Interference and diffraction PYQ is part of the Optics section of CSIR Net. Browse more Interference and diffraction questions or join the PhysicsByAaryan live batch for full conceptual coverage.