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Q.

Is it true that, dentist use concave mirror as it is curved and fits well behind the teeth?


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a

True

b

False 

answer is B.

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Detailed Solution

The given statement is false.
The dentist uses a concave mirror called a converging mirror because when the concave (converging) mirror is placed close to any object, an enlarged and virtual image is obtained. A concave (converging) mirror gives the dentist an enlarged mouth reflection while refracting a little light.
When an object is placed between the pole (P) and the focus (F) of a concave mirror, the image formed is virtual, erect, enlarged and behind the mirror.
A concave mirror forms a magnified image; hence it is best suitable for the dentist.
The correct statement would be that dentists use concave mirrors to form a magnified image.
 
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