Question

A point-like object is placed at a distance of in front of a convex lens of focal length . A plane mirror is placed at a distance of behind the lens. The position and nature of the final image formed by the system is 

A

from the mirror, real

B

from the mirror, real

C

from the mirror, virtual

D

from the mirror, virtual

Medium
Solution
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Correct option is A)

For first reflection at convex lens



.

Real image is formed at from the lens.
This image acts as an object for the plane mirror after reflection, it's image is formed at behind the plane mirror at
The image at is the virtual object for the convex lens.
So, for
for
For second refraction at convex lens.





For   (towards left of lens).

So distance from mirror   (real image)

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