How does the angular separation between frings in single-slit diffraction experiment change when the distance of separation between the slit and screen is doubled ?

Explanation

To solve the question of how the angular separation between fringes in a single-slit diffraction experiment changes when the distance between the slit and the screen is doubled, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Setup**:
- We have a single slit of width \( a \).
- The screen is placed at a distance \( D \) from the slit.
- The central maximum is the brightest fringe, with minima on either side.
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