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Physics-

General

Easy

Question

A glass prism of refractive index 1.5 is immersed in water $open parentheses mu equals 4 divided by 3 close parentheses.$ Light beam incident normally on the face AB is totally reflected to reach the face BC if

$\sin θ > 8 / 9$
$2 / 3 < \sin θ < 8 / 9$
$\sin θ \leq 2 / 3$
$\cos θ \geq 8 / 9$

The correct answer is: $sin invisible function application theta greater than 8 divided by 9$

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