Question
Physics Question on Ray optics and optical instruments
A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the power of the lens is:
A
(+2D)
B
(+20D)
C
(+5D)
D
infinity
Answer
(+2D)
Explanation
Solution
The correct answer is (c ). (+5D)