A ray of light travels from a medium of refractive index μ to air. Its angle of incidence in the medium is θ , measured, from the normal to the boundary and its angle of deviation is δ , δ is plotted against θ .
(i) Which of the following best represents the resulting curve?
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Ans.
(i)
Sol.
(ii) ,
Sol. Ψ = sin–1 
, 
= 2
(iii)
Sol. δ 1= 
– sin–1 
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