AIPMT PRELIMS2008Physics-Optics
AIPMT PRELIMS 2008 Physics Lens Combination MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial. The power of the combination is -
A
f₁ + f₂/2
B
f₁ + f₂/f₁f₂
C
f₁/f₂
D
f₂/f₁
Correct Answer
Option B
Detailed Explanation
The power of a combination of lenses in contact is the sum of their individual powers: P = P₁ + P₂ = 1/f₁ + 1/f₂.
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