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

Answer:

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

Answer 2

Answer:

No Refraction takes places

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