Physics-
General
Easy

Question

A ray of light, travelling in a medium of refractive index 2, is incident onto the flat surface of a slab, the angle of incidence being 37° The refractive index m of the material of the slab varies with depth (x) from the top surface as mu open parentheses x close parentheses equals R open parentheses 2 minus x close parentheses, where x is in ‘m’ and R is 1 m–1 The maximum depth reached by the ray is text  (take  end text open sin invisible function application 37 to the power of ring operator end exponent almost equal to 0.6 close parentheses

  1. fraction numerator 8 over denominator 5 end fraction m    
  2. fraction numerator 6 over denominator 5 end fraction m    
  3. fraction numerator 3 over denominator 5 end fraction m    
  4. fraction numerator 4 over denominator 5 end fraction m    

The correct answer is: fraction numerator 4 over denominator 5 end fraction m

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