Physics-
General
Easy

Question

A ray of light strikes a plane mirror at an angle of incidence 45° as shown in the figure. After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is 4°. The angle through which the mirror should be rotated if the total deviation of the ray is to be 90° is:

  1. 1 to the power of ring operator end exponent clockwise    
  2. 1 to the power of ring operator end exponent anticlockwise    
  3. 2 to the power of ring operator end exponent clockwise    
  4. 2 to the power of 0 end exponent anticlocwise.    

The correct answer is: 1 to the power of ring operator end exponent anticlockwise

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