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Solution


Q.

Which of the following mirror is used by a dentist to examine a small cavity
1 Convex mirror  
2 Plane mirror  
3 Concave mirror  
4 Combination of convex and concave mirror  

Ans.

(3)

As concave mirror gives the dentist a magnified reflection of the mouth while also refracting a bit of light. It forms an image in the mirror as larger, brightened and for the dentist easier to see.