Physics-
General
Easy

Question

A point source of light ' S ' at a distance d from the screen A produces light intensity  at the centre of the screen. If a completely reflecting mirror M is placed at a distance  behind the source as shown in the figure, treating object and its image as inooherent with each other, find the intensity at the centre of the screen.

  1. 9 over 10 I subscript 0
  2. 10 over 9 I subscript 0
  3. 8 over 9 I subscript 0
  4. 9 over 8 I subscript 0

The correct answer is: 10 over 9 I subscript 0

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