Question

Assertion :The refractive index of diamond is $\sqrt{6}$ an that of a liquid is $\sqrt{3}$. If light travels from diamond to the liquid, it will be totally reflected when the angle of incidence is ${30}^{\circ }$ Reason: $\mu =\frac{1}{\sin c}$, where $\mu$ is the refractive index of diamond w.r.t liquid

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason are correct

Answer 1

The correct option is D Assertion is incorrect but Reason are correct

$\sqrt{6}Sin\theta =\sqrt{3}Sin90$

$⟶\theta ={45}^o$

So the angle of incidence has to be more than ${45}^{\circ }$ for total internal reflection

The assertion is wrong. The reason is correct