RRB NTPC 2021 · Question 7 of 131

Which type of mirror is used by dentists to see large images of patients' teeth?

AConvex mirror
BConcave mirrorCorrect
CSpherical mirror
DSpherical and Convex mirror

Answer: B. Concave mirror

Explanation

Dentists use concave mirrors to see teeth and other areas in the mouth. This is because a concave mirror forms a virtual, erect and enlarged image when the object is placed within focus.

Source: RRB NTPC 2021 CBT 1 Previous Year Paper (3 Feb) — ixambee compilation with answer key · reliable-secondary

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