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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 )
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The input resistance of a silicon transistor is 100 W. Base current is changed
- Three capacitors each of capacitance C and of breakdown voltage V are joined in series
- The temperature of ideal gas is reduced from 927° C to 27° C. The r.m.s velocity
- The electric current in AC circuit is given by the relation i-3 sinωt+4 cos ωt.
- Which one of the following bonds produces a solid that reflects light in the visible region
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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