Optics Question 611

Question: A diminished image of an object is to be obtained on a screen 1.0 m from it. This can be achieved by appropriately placing

[IIT JEE 1995]

Options:

A) A convex mirror of suitable focal length

B) A concave mirror of suitable focal length

C) A concave lens of suitable focal length

D) A convex lens of suitable focal length less than 0.25 m

Show Answer

Answer:

Correct Answer: D

Solution:

Convex mirror and concave lens do not form real image. For concave mirror $ v>u $ , so image will be enlarged, hence only convex lens can be used for the purpose.



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