A point-like object is placed at a distance of 1m in front of a convex lens of focal length 0.5m. A plane mirror is placed at a distance of 2m behind the lens. The position and nature of the final image formed by the system is
2.6m from the mirror, real
1m from the mirror, real
2.6m from the mirror, virtual
1m from the mirror, virtual
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Correct option is A)
For first reflection at convex lens
Real image is formed at 1m from the lens.
This image acts as an object for the plane mirror after reflection, it's image is formed at 1m behind the plane mirror at I′
The image at I′ is the virtual object for the convex lens.
So, μ=−3m for I′
f=+0.5m for I′
For second refraction at convex lens.
For v=53=0.6 (towards left of lens).
So distance from mirror ⇒2+0.6=2.6m (real image)
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