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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
- Ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen
- If the image formed by a convex mirror of focal length 30 cm is a quarter of the size
- The half life of a radioactive isotope ‘X’ is 20 years. It decays to another element Y
- In an inductor when current changes from 2 A to 18 A in 0.05 sec, the e.m.f. induced
- Charge passing through a conductor of cross-section area A=0.3 m² is given
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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