Question

A real image is formed by a convex lens. If we put it in contact with a concave lens and the combination again forms a real image which of the following is true for the new image from the combination ?

• A. Shifts towards the lens system
• B. Shifts away from the lens system
• C. Remains at the original position
• D. No image is formed

Answer 1

Answer: (B)

Shifts away from the lens system

Answer 2

$\frac{1}{F}=\frac{1}{f_1}-\frac{1}{f_2}$ Since, combination is convex, therefore F is +VE. Hence $f_2>f_1$. This gives F greater than $f_1$ and the image will shift away from the lens system.