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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: - A hollow sphere of charge does not produce an electric field at any
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A hollow sphere of charge does not produce an electric field at any
- Identify the paramagnetic substance
- A source of sound S emitting waves of frequency 100 Hz and an observer
- If a solid sphere of mass 1 kg and radius 0.1 m rolls without slipping at a uniform
- In a region, the potential is represented by V(x,y,z)=6x-8xy-8y+6yz, where V
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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