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JEE Main 202125 FebruaryEvening Shift
Exam
JEE Main
Year
2021
Date
25 February
Shift
Evening Shift
Subject
Physics
Chapter
Wave Optics

JEE Main 2021 · 25 February · Evening Shift · Physics · Wave Optics

Consider the diffraction pattern obtained from the sunlight...

Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter 0.1\mum.0 . 1\mum . If the diameter of the pinhole is slightly increased, it will affect the diffraction pattern such that

Options

  1. Aits size increases, and intensity increases
  2. Bits size decreases, and intensity decreases
  3. Cits size decreases, but intensity increases
  4. Dits size increases, but intensity decreases

Correct answer

C. its size decreases, but intensity increases

Step-by-step solution

sinθ=mλasin\theta = \dfrac{m\lambda}{a}

when a increases, θ\theta decreases,

width decreases

width decreases so intensity will increases

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