In a double slit experiment, the two slits are 1 mm
    apart and the screen is placed 1 m away. A
    monochromatic light of wavelength 500 nm is used.
    What will be the width of each slit for obtaining ten
    maxima of double slit within the central maxima of
    single slit pattern ?

  • 0.1 mm
  • 0.5 mm
  • 0.02 mm
  • 0.2 mm
  • Explanation:

    Angular width of central maxima in double slit

    experiment = β/D= λd/d/D= λ/d

    Angular width of central maxima in single slit

    experiment = 2λ/d'

    ⇒ d' = 0.2 d = 0.2 mm
    hence option (4)

In a double slit experiment, the two slits are 1 mmapart and the screen is placed 1 m away. Amonochr
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