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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: - A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
- Two slits in Young’s experiment have widths in the ratio 1:25. The ratio of intensity
- If X=3YZ², find dimensions of Y if X and Z are the dimensions of capacity
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
- Two slits in Young’s experiment have widths in the ratio 1:25. The ratio of intensity
- If X=3YZ², find dimensions of Y if X and Z are the dimensions of capacity
- The area of cross-section of a steel wire (Y=2.0×10¹¹ N/m²) is 0.1 cm².
- The work function of a substance is 4.0 eV. The longest wavelength of light
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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