A glass slab has a critical angle of `30^(@)` when placed in air. What will be the criticle angle when it is placed in liquid of refractive index 6/5
A glass slab has a critical angle of `30^(@)` when placed in air. What will be the criticle angle when it is placed in liquid of refractive index 6/5 index?
A. `45^(@)`
B. `37^(@)`
C. `53^(@)`
D. `60^(@)`
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Correct Answer - B
(b) Refractive index of glass,`µ_(g)=1/(sin30^(@))=2`
Now, `sintheta_(c)=(6//5)/2=3/5`
`therefore theta_(C)=37^(@)`
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