For a situation shown in figure, find the refrective index of glass so that it will suffer total internal reflection at the vertical surface
1.732
1.5
1.31
1.6
C.
1.31
r + ic = 90o
r = 90o ic
μ =
=
μ = ......(i)
.......(ii)
From equation (i) and (ii)
sin ic =
⇒ tan ic =
⇒ ic ≈ 49o 11' = 50o
⇒
⇒ μ =
⇒ μ = 1.31
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