JEE Main 2023 + NEETMedium
Q.A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -30 cm. The focal length of combination is
a
60 cm
b
-60 cm
c
12 cm
d
-12 cm
Correct Answer: Option A
The correct solution involves applying the fundamental concept to derive the final value step by step...