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Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial. The power of the combination is:
Options
(a) √ f₁ / f₂
(b) √ f₂ / f₁
(c) f₁ + f₂ / 2
(d) f₁ + f₂ / f₁f₂
Correct Answer:
f₁ + f₂ / f₁f₂
Explanation:
The focal length of the combination
1/f = 1/f₁ + 1/f₂
Power of the combinations,
P = f₁ + f₂ / f₁ f₂ ( P = 1 / f )
Related Questions: - Which of the following will be σ if Y=2.4 η?
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following will be σ if Y=2.4 η?
- An ideal spring with spring constant K is hung from the ceiling and a block of mass
- A proton is projected with a speed of 3×10⁶ m/s horizontally from east to west.
- A body is thrown vertically upward in air when air resistance is taken into account
- An α-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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