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Astigmatism is corrected by using
Options
(a) cylindrical lens
(b) plano-convex lens
(c) plano-concave lens
(d) convex lens
Correct Answer:
cylindrical lens
Explanation:
In this defect, eye cannot perpendicular directions clearly that is horizontal and vertical lines simultaneously. It is due to imperfect spherical nature of eye lens. This defect can be removed by using cylindrical lenses.
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A 200 W sodium street lamp emits yellow light of wavelength 0.6 µm
- Two discs of moment of inertia I₁ and I₂ and angular speeds ?￢ﾂﾁ and ?￢ﾂﾂ are rotating
- A car of mass m is moving on a level circular track of radius R
- A long straight wire carries a certain current and produces a magnetic field
- Minority carriers in a p-type semiconductor are
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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