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Q.

Which of the following mirrors is used by a dentist to Examine a small cavity?


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a

Convex mirror

b

Plane mirror

c

Concave mirror

d

Combination of a concave and convex mirror  

answer is C.

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Detailed Solution

A concave mirror is used by a dentist to Examine a small cavity.
A concave mirror forms a virtual erect and enlarged image when the object is placed between the focus and the pole of the mirror. That is why a dentist uses a concave mirror to Examine a small cavity so the dentist can obtain an enlarged image of the cavity to Examine. The surface of the concave mirror is bent inward and outward.   
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