Question

snell formula defines
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Answer 1

Answer:

Snells Law Formula. Snell's law tells us the degree of refraction and relation between the angle of incidence, the angle of refraction and refractive indices of given pair of media. ... It is also known as the law of refraction. In 1621, Willebrord Snell discovered the law of refraction, hence called Snell's law.

Answer 2

Explanation:

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