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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.
Related Questions: - At place on earth, the vertical component of earth’s magnetic field is √3 times
- Excitation energy of a hydrogen like ion, in its first excitation state, is 40.8 eV.
- Rate of photoelectric emission is proportional to
- A particle of mass M is executing oscillations about the origin on the x-axis.
- A particle moves along the x-axis such that its co-ordinate (x) varies with time (t)
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- At place on earth, the vertical component of earth’s magnetic field is √3 times
- Excitation energy of a hydrogen like ion, in its first excitation state, is 40.8 eV.
- Rate of photoelectric emission is proportional to
- A particle of mass M is executing oscillations about the origin on the x-axis.
- A particle moves along the x-axis such that its co-ordinate (x) varies with time (t)
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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