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BITSAT2012PhysicsWave OpticsActual

In a Young's double slit experiment the angular width of a fringe formed on a distant screen is 1^ . The wavelength fo the light used is 6280 . What is the distance between the two coherent sources?

Options

  1. A0.036 ~mm
  2. B0.12 ~mm
  3. C6 ~mm
  4. D4 ~mm

Correct answer

A. 0.036 ~mm

Step-by-step solution

The angular fringe width is given by = d where is wavelength and d is the distance between two coherent sources. Thus array l d = Given, =6280 , =1^ = 180 radian array Thus d = 6280 10⁻¹⁰ 3.14 180=3.6 10⁻⁵ ~m =0.036 ~mm

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