What will be the refractive index for yellow colour if the refractive index for red colour is 1.645 and for blue colour is 1.665 ? The spectrum is produced by a glass prism of dispersive power 0.052.

Explanation

To find the refractive index for yellow color using the given refractive indices for red and blue colors and the dispersive power of the prism, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Formula for Dispersive Power**:
The dispersive power (ω) is defined as:
\[
\omega = \frac{n_b - n_r}{n_y - 1}
...