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BITSAT2011PhysicsWave OpticsActual

If the distance between the first maxima and fifth minima of a double slit pattern is 7 ~mm and the slits are separated by 0.15 ~mm with the screen 50 cm . from the slits, then the wavelength of the light used is:

Options

  1. A200 nm
  2. B100 nm
  3. C800 nm
  4. D600 nm

Correct answer

D. 600 nm

Step-by-step solution

There are three and a half fringes from first maxima to fifth minima as shown. = 7 ~mm 3.5 =2 ~mm = D d =600 nm

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