Neha visited a dentist in his clinic. She observed that the dentist was holding an instrument fitted with a mirror. State the nature of this mirror and reason for its use in the instrument used by dentist.

Explanation

**Step-by-Step Solution:**

1. **Identify the Mirror Type:**
The mirror used by the dentist is a concave mirror.

2. **Reason for Using Concave Mirror:**
Dentists use concave mirrors because they can produce a magnified image of the teeth. This is essential for dentists to examine the teeth and oral cavity more clearly.

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