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Two thin lenses when placed in contact, then the power of combination is +10 D. If they are kept 0.25 m apart, then the power reduces to +6 D. The focal lengths of the lenses (in m) will be
Options
(a) 0.5 and 0.125
(b) 0.5 and 0.75
(c) 0.125 and 0.75
(d) both have the same focal length 1.25
Correct Answer:
0.5 and 0.125
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A uniform rod of length l is placed with one end in contact with the horizontal
- Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube.
- A charged oil drop is suspended in a uniform field at 3×10⁴ V/m so that it neither falls
- A coil of resistance 10 Ω and an inductance 5 H is connected to a 100 volt
- An electron in a circular orbit of radius 0.05 nm performs 10¹⁶ rev/s. The magnetic
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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