Q7 of 25 Page 10

An object is placed at a distance of 30 cm from a concave lens of focal length 15 cm. List four characteristics (nature, position, etc.) of the image formed by the lens. ( CBSE 2013, 2012)

Given u = -30 cm; f = -15 cm





v = -10 cm


the magnifcation, M=v/u=(-10)/(-30)= 0.333

Characteristics of image are


a. The image formed is virtual.


b. It is erect.


c. It is diminished in size.


d. The image is formed at a distance of 10 cm from the optical center of the concave lens on the same side of the object.

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