Question

the angle of incidence on surface separating 2 media is 0 degree.what will the angle the surface separating the 2 media and the incident ray ?

Answer 1

Hi..

By snells law..

n1 sin(a1) = n2 Sin(a2)

where n1 is the refractive index of medium 1 and n2 for medium 2. Given that

a1 = 0 (the incident ray is perpendicular to the boundary between media 1 and 2).

Then Snell’s law becomes 0 = n2 sin(a2). Either n2 = 0 (impossible) or sin(a2) = 0. If sin(a2) = 0 then a2 = 0 so the ray is unrefracted and the deviation is 0. The light ray changes speed entering medium 2..

Hope this helps u!