If angle α is choosen in such a way that total internal reflection will occur at both opposite side. Medium outside the prism is air. Refractive index of prism is 1.5.
(i) If Deviation between the ray incoming and leaving the prism is "d" then value of d.
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Ans.
(i)
Sol.
45 º – β > θ c is common solution for T/R at the both opposite surface
45º – θ C > b
sin (45– θ C ) > sin β
snell law sin α = 1.55 sin β
[cos θ C – sin θ C ] > sin α
> sin α
> sin α
(ii)
Sol. angle between the incoming and leaving the prism is 180º
(iii)
Sol.
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