Question

In the arrangement shown in fig, O is the object. An observer is to the left of convex lens and looking towards lens. The observer will see an image

• A. behind the mirror
• B. between lens and mirror
• C. to the left of lens
• D. no image will be seen

Answer 1

The correct option is B between lens and mirror

Initially the image formed by lens is at $v=+20$ i.e, a virtual image in mirror, hence the mirror forms real image at $20cm$ from the mirror, which serves as virtual object for the lens with $u=+8$

$\frac{1}{v}-\frac{1}{u}=\frac{1}{f}$

$\frac{1}{v}-\frac{1}{8}=\frac{1}{10}$

$v<0$

Hence, image is formed in between lens and mirror.