JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 15 April 2023, Shift 1, Physics Q46

Question 46 of 90 in this shift, Physics question 16 of 30, Section A.

A single slit of width

a

is illuminated by a monochromatic light of wavelength 600 nm. The value of '

a

' for which first minimum appears at

\theta = 30^{\circ}

on the screen will be :

(1)0.6 $\mu$ m
(2)1.2 $\mu$ mOfficial answer
(3)1.8 $\mu$ m
(4)3 $\mu$ m

Official answer

Option 2

NTA final key.

Chapter: Wave Optics
Topic: Single Slit Diffraction
Idea tested: Single Slit Minima Condition

Same idea in other shifts

Asked 5× in all

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2 Apr 2025, Shift 1 · Q50If the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right of the…MediumNumerical value
5 Apr 2024, Shift 2 · Q53In a single slit experiment, a parallel beam of green light of wavelength 550 nm passes through a slit of width 0.20 mm. The transmitted…EasyNumerical value
8 Apr 2024, Shift 1 · Q59A parallel beam of monochromatic light of wavelength 600 nm passes through single slit of 0.4 mm width. Angular divergence corresponding…EasyNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.