Question

what happens when light travels from one medium to another with a different index of refraction at a zero degree angle of incidence?

Answer 1

If the index of refraction of the medium is greater, the light slows down.

Answer 2

No Refraction takes places

Step-by-step explanation:

When light travels from one medium to another at an angle of incidence 0 degree then no refraction takes place .

It is because according to Refraction law

`n_(i)`sini =
`n_(r)`sinr

where
`n_(i) ,n_(r)` are the refractive index of medium of incidence and medium of refraction .

When i = 0 , left side of the equation becomes 0 and thus r (angle of refraction) must be zero. So No refraction takes place