What is the relation between the angle of incidence and angle of refraction?

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Solution

Snell's law 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. It states that the ratio of the sines of the angles of incidence and refraction is equal to the refractive index of the second medium with respect to the first medium.
$\frac{s i n i}{s i n r} = \frac{n_{2}}{n_{1}}$

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