Explain astigmatism, Physics

Assignment Help:

Astigmatism:

In this defect the surface of eye is not perfectly spherical. The eye has different focal point in dissimilar planes and image of an object is not focused clearly on the retina.

Correction:

Astigmatism is corrected by asymmetrical lenses which have dissimilar radii of curvature in dissimilar plane.

 


Related Discussions:- Explain astigmatism

Isolation transformers and step up or step down transformer, Q. What is the...

Q. What is the dissimilarity between isolation transformers and step up or step down transformer? Answer:- In fact an isolation transformer may be physically the same as a

Define speed, SPEED: The distance covered by a body in unit time is kno...

SPEED: The distance covered by a body in unit time is known as speed. It is represented by V.

Illustrates the formula of rayleigh-jeans law, Illustrates the formula of R...

Illustrates the formula of Rayleigh-jeans law? RAYLEIGH-JEANS LAW The energy distribution into the thermal spectrum is specified by given formula as follows: E λ = 8Πk

Write the difference between telescope and microscope, If the refractive in...

If the refractive index of a medium is 1.5, determine the critical angle. Write the difference between telescope and microscope.

Expression for the intensity distribution , Q.   Derive an expression for t...

Q.   Derive an expression for the intensity distribution due to Fraunhofer's diffraction at a single slit and shows that the intensity of the first subsidiary maxima is about 4.5 p

Explain working principle of d.c motor, Working Principle of D.C Motor ...

Working Principle of D.C Motor A) An electric motor is a machine which changes electrical energy into mechanical energy. B) When a current carrying conductor is placed in a

Applications of coupled oscillator concepts, Can you give me few applicatio...

Can you give me few applications of coupled oscillator concepts?

Relation between a proton and an alpha particle, A proton and an alpha part...

A proton and an alpha particle pass by the gap of a strong magnet.  If both particles have the similar initial velocity, how many times greater will the defection of the proto

Determine the power input of ac motor, A 415V 3-phase a.c. motor has a powe...

A 415V 3-phase a.c. motor has a power output of 12.75kW and operates at a power factor of 0.77 lagging and with an ef?ciency of 85%. If the motor is delta-connected, verify

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd