The critical angle for light going from medium ' $x^{\prime}$ to medium ' $y$ ' is ' $\theta$ '. The speed of light in medium ' $x$ ' is ' $v_x$ '. The speed of light in medium ' $y$ ' is
- A$\frac{v_x}{\tan \theta}$
- B$v_x \sin \theta$
- C$v_x \tan \theta$
- D$\frac{v_x}{\sin \theta}$
✓ Correct answer: D
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