Question

Define snell's law of refraction a ray of light is incident on a glass slab

Answer 1

Snells law is that the ratio of sin (any angle) of incidence to the angle of refraction is equal to constant (refracting index)

Answer 2

✨✔️✔️HERE IS YOUR ANSWER....

The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given colour and for the given pair of media. This law is known as Snell’s Law of Refraction.

$\frac{sin \: i}{sin \: r } = constant$

✨✔️✔️HOPE IT HELPS YOU....
✌❤✌