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KVPY2011PhysicsWave Optics

In a Young's double slit set-up, light from a laser source falls on a pair of very narrow slits separated by 1.0 micrometer and bright fringes separated by 1.0 millimeter are observed on a distant screen. If the frequency of the laser light is doubled, what will be the separation of the bright fringes ?

Options

  1. A0.25 ~mm
  2. B0.5 ~mm
  3. C1.0 ~mm
  4. D2.0 ~mm

Correct answer

B. 0.5 ~mm

Step-by-step solution

Separation array l Bright fringe = D d f =c array If f is doubled become halved become half = 1 2 =0.5 ~mm

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