Optics Question 590

Question: The ray diagram could be correct

[CPMT 1988]

Options:

A) If $ n _{1}=n _{2}=n _{g} $

B) If $ n _{1}=n _{2} $ and $ n _{1}<n _{g} $

C) If $ n _{1}=n _{2} $ and $ n _{1}>n _{g} $

D) Under no circumstances

Show Answer

Answer:

Correct Answer: C

Solution:

If $ n _{l}>n _{g} $ then the lens will be in denser medium. Hence its nature will change and the convex lens will behave like a concave lens.



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