Question

what is the law of refraction of light?

Answer 1

Angle of incident and refracted is not equal
Angle of reflection and normal and refracted is lie on the same plain

Answer 2

Hello friend.
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Well law of refraction is also known as Snell's Law.

Therefore, Snell's Law states that,
The ratio of sine of angle of incidence to the sine of angle of refraction is constant.

That is, [sine of angle of incidence(i)] / [sine of angle of refraction(r)] = μ

Where μ is the refractive index.
Therefore the formula is,
=> sin i/sin r = μ.
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Hope it helps you.
Thank you.