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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
- In a primary coil 5 A current is flowing on 220 V. In the secondary coil 2200 V
- A potentiometer wire has length 4m resistance 8Ω. The resistance that must be connected
- The additional energy that should be given to an electron to reduce its de-Broglie
- A particle moving along X-axis has acceleration f,at time t given by f=fₒ(1- t/T)
- The ratio of the dimensions of planck’s constant and that of the moment of inertia is
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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