Optics Question 648

Question: A double convex lens of glass of m = 1.5 has radius of curvature of each of its surface is 0.2 m. The power of the lens is

[JIPMER 1999]

Options:

A) + 10 dioptres

B) - 10 dioptres

C) - 5 dioptres

D) +5 dioptres

Show Answer

Answer:

Correct Answer: D

Solution:

f=R2(μ−1)

⇒P=2(μ−1)R=2(1.5−1)0.2=+5D

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