AIPMT PRELIMS2006Physics-Optics
AIPMT PRELIMS 2006 Physics Lens Combination MCQ Question
Type: MCQ-numerical-Medium-Class 12
A convex lens and a concave lens, each having same focal length of 25 cm, are put in contact to form a combination of lenses. The power in diopters of the combination is:
A
25
B
50
C
infinite
D
zero
Correct Answer
Option D
Detailed Explanation
The power of a lens combination is the sum of the individual powers. Since the lenses have equal and opposite focal lengths, their powers cancel each other out, resulting in zero power.
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