How does the dispersive power of glass prism change when it is dipped in water?

Explanation

To determine how the dispersive power of a glass prism changes when it is dipped in water, we can follow these steps:

### Step 1: Understand Dispersive Power
Dispersive power (W) of a prism is defined as the ratio of the difference in the refractive indices of the prism material for different wavelengths (colors) of light to the mean deviation of the prism. Mathematically, it can be expressed as:
\[ W = \frac{d(\mu)}{\delta} \]
where \( d(\mu) \) is the difference in refractive indices for different wavelengths, and \( \delta \) is the mean deviation.

### Step 2: Consider the Refractive Indices
...