JEE PHYSICS MCQ: RAY OPTICS

1 Medium

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Application +4 | -1

Two transparent media A and B are separated by a plane boundary. The speed of light in those media are

1.5 \times {10^8}

m/s and

2.0 \times {10^8}

m/s, respectively. The critical angle for a ray of light for these two media is:

View answer and explanation

Correct option: C

{\sin ^{ - 1}}\,\left( {0.750} \right)

The correct answer is C. The critical angle is calculated using the ratio of the speeds of light in the two media, specifically using the formula

\sin i_c = \frac{{v_R}}{{v_D}}

where

v_R

is the speed in the rarer medium and

v_D

is the speed in the denser medium.

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