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BITSAT2023PhysicsWave OpticsActual

A single slit of a width a is illuminated by a monochromatic light of wavelength 600 ~nm . The value of ' a ' for which first minimum appears at =30^ on the screen will be :

Options

  1. A0.6 m
  2. B1.2 m
  3. C1.8 m
  4. D3 m

Correct answer

B. 1.2 m

Step-by-step solution

Wavelength of monochromatic light, =600 10⁻⁹ ~m As fir first minima a = aligned & a 30^ =600 10⁻⁹ & a =1200 10⁻⁹ ~m =1.2 m aligned

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