#### Question

A ray of light falls on a transparent sphere with centre C as shown in the figure. The ray emerges from the sphere parallel to the line AB. Find the angle of refraction at A if the refractive index of the material of the sphere is \[\sqrt{3}\].

#### Solution

From Snell's law, we have: \[\frac{\sin\left( i \right)}{\sin\left( r \right)} = \mu\] At A, i = 60° (given)

Now*, *μ = √3

\[\Rightarrow \sin\left( r \right) = \frac{\sin\left( i \right)}{\mu}\]

\[ \Rightarrow \sin\left( r \right) = \frac{\sin\left( 60° \right)}{\sqrt{3}} = \frac{1}{2}\]

\[ \Rightarrow r = \sin^{- 1} \left( \frac{1}{2} \right)\]

\[ \therefore r = 30°\]

Is there an error in this question or solution?

Solution A Ray of Light Falls on a Transparent Sphere with Centre C as Shown in the Figure. the Ray Emerges from the Sphere Parallel to the Line Ab. Concept: The Parallel Plate Capacitor.