The speed of light in air is `3xx10^8` m/s. Find its speed in diamond if the refractive index of diamond is 2.42 .

Explanation

To find the speed of light in diamond given the speed of light in air and the refractive index of diamond, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship between speed of light, refractive index, and medium**:
The refractive index (n) of a medium is defined as the ratio of the speed of light in vacuum (or air) to the speed of light in that medium. The formula is:
\[
n = \frac{c}{v}
...