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MHT CET20225 Aug 2022Morning ShiftPhysicsWave OpticsActual

A light wave of wavelength ' 'is incident on a slit of width ' d '. The resulting diffraction pattern is observed on screen at a distance of ' D '. If linear width of the principal maximum is equal to width of the slit, then the distance D is

Options

  1. Ad
  2. B2 ^2 d
  3. C2 d
  4. Dd ^2 2

Correct answer

D. d ^2 2

Step-by-step solution

The correct option is (D) Concept: If D >> d , the linear width of the central principal maximum is equal to the product of angular width and the distance D . = 2 D d , where d is the width of the slit. The linear width of the principal maximum will be equal to slit width for a value of D given by 2 D d =d or D = d ^2 2

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