The focal length of a small concave mirror is 2.5 cm. In order to use this…

PYQ UPPSC LT Grade (Assistant Teacher) 2025

The focal length of a small concave mirror is 2.5 cm. In order to use this concave mirror as a dentist's mirror, the distance of tooth from mirror should be

  1. A.

    4.5 cm

  2. B.

    1.5 cm

  3. C.

    3.5 cm

  4. D.

    2.5 cm

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