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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 the force exerted by an electric dipole on a charge q at a distance of 1 m is F
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If the force exerted by an electric dipole on a charge q at a distance of 1 m is F
- Two discs of same material and thickness have radii 0.2 m and 0.6 m.
- Pure Si at 300 k has equal electrons (nₑ) and hole (nh) concentrations
- A black hole is an object whose gravitational field is so strong that even light
- In thermodynamics processes which of the following statements is not true?
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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