You are given a concave mirror of focal length 10 cm, a point source of light nad a screen placed at distance 30 cm in front of mirror. How can you obtain a bright patch of light on screen, of size equal to that of the aperture of mirror? Draw diagram to explain your answer.

Explanation

To solve the problem of obtaining a bright patch of light on a screen using a concave mirror, follow these steps:

### Step-by-Step Solution:

1. **Understand the Setup**:
- You have a concave mirror with a focal length (f) of 10 cm.
- A point source of light is placed in front of the mirror.
- A screen is positioned 30 cm away from the mirror.
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