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

Find relativstic phenomena of light, If the speed of light were smaller tha...

If the speed of light were smaller than it is, would relativistic phenomena be more or less conspicuous than they are now? All else being similar, involving the rates of the ch

How far down is the surface of the water, A hiker tosses a rock into a cany...

A hiker tosses a rock into a canyon. He hears it strike water 4.78 s later. How far down is the surface of the water?

Calculate the enthalpy of the saturated liquid, The residual enthalpy of sa...

The residual enthalpy of saturated CO2, as calculated from the SRK equation of sate, is given below The ideal gas heat capacity of carbon dioxide is  = 33 J/mol/K and ca

Explain about the monochromaticity of laser, Explain about the monochromati...

Explain about the monochromaticity of laser. Monochromaticity: The light emitted through a laser is monochromatic, that is this is of one wavelength (colour). Although in ca

Define angle of deviation in a prism?, It the angle through which light ray...

It the angle through which light ray deviates from the original straight line path.

Projectile motion, after 1sec of projectile makes an angle of 45 with the h...

after 1sec of projectile makes an angle of 45 with the horizontal after another 1 sec travelling horizontally find magnitude of initial velocity and angle of projection

Determine magnitude of the charge on capacitor''s plates, A 10 farad capaci...

A 10 farad capacitor is used in a circuit. The voltage difference between the plates of the capacitor is 20 volts. What is the magnitude of the charge on each of the capacitor's pl

Gauss law for magnetic fields, Gauss' law for magnetic fields (K.F. Gauss) ...

Gauss' law for magnetic fields (K.F. Gauss) The magnetic flux by a closed surface is zero; no magnetic charges present; in differential form, div B = 0.

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