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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 of the following is not a thermodynamical coordinate?
- A source of sound of frequency 256 Hz is moving rapidly towards a wall with a velocity
- In a common emitter transistor amplifier, the voltage gain is
- A simple pendulum performs simple harmonic motion about x = 0 with an amplitude
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following is not a thermodynamical coordinate?
- A source of sound of frequency 256 Hz is moving rapidly towards a wall with a velocity
- In a common emitter transistor amplifier, the voltage gain is
- A simple pendulum performs simple harmonic motion about x = 0 with an amplitude
- The work of 146 kJ is performed in order to compress one kilo mole fo gas adiabatically
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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