Question:medium

A slit of width $a$ is illuminated by light of wavelength $\lambda$. The linear separation between the 1st and 3rd minima in the diffraction pattern produced on a screen placed at a distance $D$ from the slit is:

Updated On: Apr 4, 2026

$ \dfrac{3D\lambda}{a} $
$ \dfrac{3D\lambda}{2a} $
$ \dfrac{D\lambda}{a} $
$ \dfrac{2D\lambda}{a} $

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The Correct Option is D

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A slit of width \(a\) is illuminated by light of wavelength \(\lambda\). The linear separation between the 1st and 3rd minima in the diffraction pattern produced on a screen placed at a distance \(D\) from the slit is:

The Correct Option is D

Solution and Explanation

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