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Q.

Study the diagrams given below carefully and answer the following questions.


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Which of the three mirrors A, B and C is used by a dentist to observe cavities in the teeth?


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a

Fig. 1

b

Fig. 2

c

Fig. 3

d

None 

answer is B.

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Detailed Solution

Mirror B is used by a dentist to observe cavities in the teeth
Fig. 2 shows a concave mirror. A dentist uses a concave mirror to observe cavities in the teeth.
Concave mirrors are also known as converging mirrors that reflect light to the focus point. It produces magnified, erect and virtual images. It will be easy for the dentist to locate cavities when he uses a concave mirror as it produces magnified images.
 
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