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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 nuclei of which one of the following pairs of nuclei are isotones?
- If emf induced in a coil is 2 V by changing the current in it from 8 A to 6 A
- Electrons used in an electron microscope are accelerated by a voltage of 25 kV
- A body is rolling down an inclined plane.If KE of rotation is 40% of KE in a translatory
- In a Rutherford scattering experiment when a projectile of charge Z₁ and mass M₁
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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