Question

what is snell's law? plz give me the ratio

Answer 1

When light travels from one medium to another, it generally bends, or refracts. The law of refraction gives us a way of predicting the amount of bend. This law is more complicated than that for reflection, but an understanding of refraction will be necessary for our future discussion of lenses and their applications. The law of refraction is also known as Snell's Law, named for Willobrord Snell, who discovered the law in 1621.

Snell's Law

Like with reflection, refraction also involves the angles that the incident ray and the refracted ray make with the normal to the surface at the point of refraction. Unlike reflection, refraction also depends on the media through which the light rays are travelling. This dependence is made explicit in Snell's Law via refractive indices, numbers which are constant for given media1.

Answer 2

Snell's law (also known as Snell–Descartes law and the law of refraction) is a formulaused to describe the relationship between theangles of incidence and refraction, when referring to light or other waves passing through a boundary between two differentisotropic media, such as water, glass, or air.

sinQ1/v1 = sinQ2/v2 = lemda 1/lemda 2 = n2/n1


here Q = teeta