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A microwave of wavelength 2.0 cm falls normally on a slit of width 4.0 cm . The angular spread of the central maxima of the diffraction pattern obtained on a screen 1.5 m away from the slit, will be:

Options

  1. A60^
  2. B45^
  3. C15^
  4. D30^

Correct answer

A. 60^

Step-by-step solution

Condition for minima is d = n For Ist minimad = = a = 2 4 = 1 2 =30^ Angular spread =2 =60^

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