JEE PHYSICS MCQ: RAY OPTICS

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Assertion : Critical angle is maximum for end colour in water air system for visible light.

Reason: Because

\sin \theta_{\mathrm{C}}=\frac{1}{\mu}

and

\mu_{\mathrm{r}}

, (refractive index of red colour) is minimum for visible light.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion

Option A (If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion) is correct because the critical angle depends on the refractive index, which is minimum for red light, leading to a maximum critical angle.

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