Two convex lenses placed in contact form the image of a distant object at P. If the lens B is moved to the right, the image will

Options

A. move to the left
B. move to the right
C. remain at P
D. move either to the left or right, depending upon focal length of the lenses

Answer

B

Explanation

`1/(F_1)=1/(f_1)+1/(f_2)`
`1/(F_2)=1/(f_1)+1/(f_2)-d/(f_1f_2)`
`F_2gtF_1`
So, image of distant object will be formed to the
right of P.