Question

24.A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence 45 degrees.The ray undergoes total internal reflection.The possible value of refractive index of the medium with respect to air is ---------------

Answer 1

Critical angle:


$C={45}^o$

$$\begin{gathered} Refractiveindex: \\ \mu =\frac{1}{\sin C} \\ =\frac{1}{\sin {45}^o} \\ =\sqrt{2} \\ =1.41 \end{gathered}$$