Optics Question 661

Question: A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are joined together. The power of the combination will be

[MP PMT 2001]

Options:

A) ? 16 D

B) + 16 D

C) ? 6 D

D) + 6 D

Show Answer

Answer:

Correct Answer: C

Solution:

P=100f1+100f2=100(+25)+100(10)=6D



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