Optics Question 583

Question: A concave and convex lens have the same focal length of 20 cm and are put into contact to form a lens combination. The combination is used to view an object of 5 cm length kept at 20 cm from the lens combination. As compared to the object, the image will be

[CPMT 1986; RPMT 1997]

Options:

A) Magnified and inverted

B) Reduced and erect

C) Of the same size as the object and erect

D) Of the same size as the object but inverted

Show Answer

Answer:

Correct Answer: C

Solution:

Resultant focal length = $ \infty $

$ \therefore $ It behaves as a plane slab of glass.



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