The sparkling of diamond is due to its very small critical angle. If the refractive index of diamond is 2.4, calculate its critical angle.

Explanation

To calculate the critical angle for diamond with a refractive index of 2.4, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Formula for Critical Angle**:
The critical angle (C) can be calculated using the formula:
\[
\sin C = \frac{1}{n}
...