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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: - Which one of the following is not due to total internal reflection?
- If dimensions of critical velocity of a liquid flowing through a tube are expressed
- Two capacitors of 10pF and 20pF are connected to 200V and 100V sources, respectively.
- An α-particle and a proton travel with the same velocity in a magnetic field
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following is not due to total internal reflection?
- If dimensions of critical velocity of a liquid flowing through a tube are expressed
- Two capacitors of 10pF and 20pF are connected to 200V and 100V sources, respectively.
- An α-particle and a proton travel with the same velocity in a magnetic field
- An object of mass 3kg is at rest. Now a force F=6t² i⃗+4t j⃗ is applied on the object
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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