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A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is
Correct Answer: (a)
Official keyThis question appeared in the TNPSC Prelims 2017 examination (GS). It is Question 98 out of 200 questions in this paper.
This question was part of the TNPSC Prelims 2017 (GS). The TNPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all TNPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.