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In Young's double slit experiment, the distance between two slits is made three times then the fringe width will become

Options

  1. A9 times
  2. B(1 / 9 ) times
  3. C3 times
  4. D(1 / 3 ) times.

Correct answer

D. (1 / 3 ) times.

Step-by-step solution

Fringe width, = D d From question, d^ =3 d New fringe width, ^ = D d^ ^ = D 3 d = 3 .

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