The critical angle for light going from medium A into medium B is $\theta$. The speed of light in the medium…

The critical angle for light going from medium A into medium B is $\theta$. The speed of light in the medium $A$ is $V_A$. What is the speed of light in the medium B?
  1. $\mathrm{V}_{\mathrm{A}} \sin \theta$
  2. $\mathrm{V}_{\mathrm{A}} \tan \theta$
  3. $\frac{\mathrm{V}_{\mathrm{A}}}{\tan \theta}$
  4. $\frac{\mathrm{V}_{\mathrm{A}}}{\sin \theta}$

Solution

${ }_{\mathrm{B}} \mu_{\mathrm{A}}=\frac{\mathrm{V}_{\mathrm{B}}}{\mathrm{V}_{\mathrm{A}}}=\frac{1}{\sin \theta}$

Asked in: MHT CET 2021 (22 Sep Shift 1)

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