A slit of width ‘a’ is illuminated by light of wavelength 6…

Physics Wave Optics JEE (Main) / AIEEE Problems ( Previous Years ) Matrix Match Questions

Published by: CGP EDU Academic Team

Published on: September 11, 2026

A slit of width ‘a’ is illuminated by light of wavelength 6000 A 0 For What value of ‘a will the :-

(i) First maximum fall at an angle of diffraction of 30 0 ?

(ii) First minimum fall at an angle of diffraction 30 0 ?

Correct Matrix Matching

Text Solution

Verified by Experts

The correct answer is:

(i)1; (ii)1; (i) For first maximum sin ; (ii) For first minimum sin

(i)1.8 μ m (ii)1.2 μ m

Sol. (i) For first maximum

sin θ m =

sin θ 1 =

or a = = = 1.8 μ m

(ii) For first minimum

sin θ m =

or sin θ 1 =

a =

a = = 1.2 μ m

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