# NEET Physics Ray Optics and Optical Instruments Questions Solved

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

(b) Convex lens will form image at ${I}_{1}$ it’s focus which acts like a virtual object for concave lens.

Hence for concave lens .

So by lens formula  i.e. distance of final image $\left({I}_{2}\right)$  from concave lens  by using

Difficulty Level:

• 24%
• 45%
• 18%
• 15%
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