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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: - If 20% of a radiactive element decays in 10 days, then amount of original material left
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If 20% of a radiactive element decays in 10 days, then amount of original material left
- Two resistances 3Ω and 6Ω are connected in parallel
- A parallel plate capacitor of a capacitance 1 pF has seperation between the plates
- A certain number of spherical dropes of a liquid of radius r coalesce to form a single
- When a beam of light is used to determine the position of an object,
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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