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JEE PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Application +4 | -1

An optical fibre

(\mu=1.72)

is surrounded by a glass coating

(\mu=1.50)

. Find the critical angle for total internal reflection at the fibre-glass interface.

View answer and explanation

Correct option: B

\sin ^{-1}\left(\frac{75}{26}\right)

Option A (

\sin ^{-1}\left(\frac{75}{86}\right)

) is correct because it is the critical angle calculated using Snell's law at the interface between the optical fiber and the glass coating.

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