Number of light waves of some frequency in 8 cm thickness of glass is same as number of light waves of same frequency in 9 cm thickness of water. If refractive index of water is 4/3, then what should be the refractive index of glass?

Explanation

To solve the problem, we need to find the refractive index of glass given that the number of light waves in an 8 cm thickness of glass is equal to the number of light waves in a 9 cm thickness of water, with the refractive index of water being 4/3.

### Step-by-Step Solution:

1. **Understanding the relationship between thickness, wavelength, and number of waves**:
- The number of waves (n) in a medium can be expressed as:
\[
n = \frac{\text{Thickness}}{\text{Wavelength}}
...