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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
- A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction
- The maximum kinetic energy of emitted electrons in a photoelectric effect
- A galvanometer having internal resistance 10Ω requires 0.01 A for a full scale
- The radius of germanium nuclide is measured to be twice the radius of ₄⁹Be.
- A uniform force of (3i+j) Nacts on a particle of mass 2 kg.Hence the particle is displaced
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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