A ray of light travelling in air is incident at an angle of incidence approaching 
on a long rectangular slab of a transparent medium of thickness d 0 .
The medium has a variable refractive index given by
μ (x) = 
where x ≥ 0 and a is a positive constant
(i) If d 0 = 
in above situation, the co-ordinates of the
point where the ray intersects the upper surface of
the slab-air interface are –
Correct Answers for Comprehension Sub-Questions
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CHECK THE SOLUTION.
Ans.
(i)
Sol. 
(ii)
Sol. 
(iii)
Sol. Emerge out from the upper surface of slab-air boundary
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