Question

n - 3n + 5n = 21 2 4 6

Answer 1

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.

Answer 2

n - 3n + 5n = 21246

n - 8n = 21246

7n = 21246

n= 21246 / 7

n = 3035