A convex lens, of focal length 30cm, a concave lens of focal length 120cm, and a plane mirror are arranged as shown. For an object kept at a distance of 60cm from the convex lens, the final image, formed by the combination, is a real image, at a distance of :
60cm from the concave lens
70cm from the convex lens
60cm from the convex lens
70cm from the concave lens
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Correct option is A)
Location of image formation after first refraction from the lens,
This gives v=60cm
Next refraction from concave lens,
Since this will be formed behind the mirror, this will be final image.
It is at a distance of 60cm from the concave lens.
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