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JEE Main202125 Feb 2021Evening ShiftPhysicsWave OpticsActual

Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter 0 . 1 μ m . 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

sin θ = m λ a when a increases, θ decreases, width decreases width decreases so intensity will increases

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