NEET2023Physics-Optics
NEET 2023 Physics Lens Combination MCQ Question
Type: MCQ-conceptual-Easy-Class 12
Two thin lenses are of same focal lengths (f), but one is convex and the other one is concave. When they are placed in contact with each other, the equivalent focal length of the combination will be:
A
f/4
B
f/2
C
Infinite
D
Zero
Correct Answer
Option C
Detailed Explanation
The equivalent focal length of a convex and concave lens of the same focal length placed in contact is infinite, as their powers cancel each other out.
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