The focal length of a dentist's mirror (concave mirror) is 3 cm.The distance of the tooth from the mirror should be

2 cm

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3 cm

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6 cm

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8 cm

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Solution

The correct option is A 2 cm
dentist's mirrors form virtually enlarged image and concave mirror forms virtually enlarged image only if the object distance is less than its focal length.
So, in this case, the distance of the tooth from the mirror should be less than 3 cm.
(A) is correct answer.

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The focal length of a dentist's mirror (concave mirror) is 3 cm.The distance of the tooth from the mirror should be

The correct option is A 2 cmdentist's mirrors form virtually enlarged image and concave mirror forms virtually enlarged image only if the object distance is less than its focal length.So, in this case, the distance of the tooth from the mirror should be less than 3 cm.(A) is correct answer.

The correct option is A 2 cm
dentist's mirrors form virtually enlarged image and concave mirror forms virtually enlarged image only if the object distance is less than its focal length.
So, in this case, the distance of the tooth from the mirror should be less than 3 cm.
(A) is correct answer.