# The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens, calculate the new size of the image a) 1.25 cm b) 2.5 cm c) 1.05 cm d) 2 cm

## Question ID - 152672 :- The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens, calculate the new size of the image a) 1.25 cm b) 2.5 cm c) 1.05 cm d) 2 cm

3537

(b)

Image formed by convex lens at  will act as a virtual object for concave lens. For concave lens

Or cm

Magnification for concave lens

As size of the image at  is 2 cm. Therefore, size of image at  will be  cm.

Next Question :
 Astigmatism (for a human eye) can be removed by using a) Concave lens b) Convex lens c) Cylindrical lens d) Prismatic lens