A student holding a mirror in his hand, directed the reflecting surface of the mirror towards the Sun. He then directed the reflected light on to a sheet of paper held close to the mirror.
What should he do to burn the paper ?

Explanation

To solve the question of how the student can burn the paper using a mirror directed at the Sun, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Type of Mirror**:
- The student needs to use a **concave mirror**. This type of mirror can focus parallel rays of light (like those from the Sun) to a single point.

2. **Position the Mirror**:
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