Question

# A real image is formed by a convex lens. If we put a concave lens in contact with it, the combination again forms a real image. the new image

A
is closer to the lens system
B
is farther form the lens system
C
is at the original position
D
may be anywhere depending on the focal length of the concave lens.
Solution
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#### When we bring in contact a concave lens the effective focal length of the combination decreases.1v−1u=1f⇒1v=1u+1faccording to above relation as f reduces, v increases.

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