Verified Solution • 2025–26 Session moderate

QNEET-2022-Ph-453: NEET 2022 Physics - Class 12 NEET-2022-Ph-453 Solution: Two transparent media A and B are separated by a plane…

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\ \text{m/s}

and

2.0 \times 10^8\ \text{m/s}

respectively. The critical angle for a ray of light for these two media is

\sin^{-1}(0.500)

\sin^{-1}(0.750)

\tan^{-1}(0.500)

\tan^{-1}(0.750)

Multiple Choice Options

A sin $-$ _ 1 (0.500)
B sin $-$ _ 1 (0.750)
C tan $-$ _ 1 (0.500)
D tan $-$ _ 1 (0.750)

Step-by-Step Verified Solution

_ A = 3 _ 10 8 1.5 _ 10 8 = 2 _ B = 3 _ 10 8 2 _ 10 8 = 1.5 For TIR, ray of light should travel from denser to rarer medium _ A sin _ _ C = _ B sin _ 90 _ 2 sin _ _ C = 1.5 sin _ 90 _ sin _ _ C = 0.75 _ C = sin _ 1 ( 0.75 )

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