| ⇦ | 
| ⇨ |
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: - Amout of heat required to raise the temperature of a body through 1 K is called its
- A coil of inductive reactance 31 Ω has a resistance of 8 Ω. It is placed in series
- The phase difference between two points seperated by 0.8 m in a wave of frequency
- For an ideal gas of diatomic molecules
- The photoelectric threshold wevelength for potassium (work function being 2 eV) is
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Amout of heat required to raise the temperature of a body through 1 K is called its
- A coil of inductive reactance 31 Ω has a resistance of 8 Ω. It is placed in series
- The phase difference between two points seperated by 0.8 m in a wave of frequency
- For an ideal gas of diatomic molecules
- The photoelectric threshold wevelength for potassium (work function being 2 eV) is
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply