Question

When does Snell's Law fail?

Answer 1

Snell's Law of Refraction fail when light incidents on the surface of separation of the 2 media normally or through the normal. It is because when light incidents through the normal, the angle of incidence is equal to zero. Therefore the angle of Refraction is also zero.

Answer 2

Answer:

senell's law fails

when the ray of light are incident normally on the surface of retracting medium to the sine of angle retraction in the second medium