Optics Question 576
Question: The radius of curvature for a convex lens is 40 cm, for each surface. Its refractive index is 1.5. The focal length will be
[MP PMT 1989]
Options:
A) 40 cm
B) 20 cm
C) 80 cm
D) 30 cm
Show Answer
Answer:
Correct Answer: A
Solution:
By formula