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The equiconvex lens has focal length f. If it is cut perpendicular to the principal axis passing through optical centre, then focal length of each half is
Options
(a) f/2
(b) f
(c) 3f/2
(d) 2f
Correct Answer:
2f
Explanation:
When an equiconvex lens is cut parallel to principal axis, then focal length remains the same and when the lens is cut perpendicular to principal axis, then its focal length becomes twice the original.
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The time period of a thin bar magnet in Earth’s magnetic field is T
- The maximum and minimum intensities of two sources is 4:1. The ratio of amplitude is
- If voltage across a bulb rated 220 volt-100 Watt drops by 2.5% of its rated value
- A battery having e.m.f. 4 volt and internal resistance 0.5 Ω is connected
- The kinetic energy needed to project a body of mass m from the surface of earth
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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