Refraction by Plane Surfaces: Practice Problem & Solution

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Refraction by Plane Surfaces. Understanding the underlying formula is key to arriving at the correct answer below:

Velocity of light in the material is given by $v = f \lambda = (2 \times 10^{14} Hz) \times (5000 \times 10^{-10} m) = 10^8 m/s$ . The refractive index of the material is calculated as $n = \frac{c}{v} = \frac{3 \times 10^8}{10^8} = 3.00$ .