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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
- In nuclear fission, the percentage of mass converted into energy is about
- An astronomical telescope arranged for normal adjustment has a magnification of 6.
- The wavelength of kα, X-rays produced by an X-ray tube 0.76Å. The atomic number
- The period of oscillation of a mass M suspended from a spring of negligible mass is T
- A particle moving in a straight line with uniform acceleration is observed
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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