Laws OF refraction

When does Snell's Law of refraction fail ?

Recap|Refraction Of Light|Law Of Refraction|Refractive Index Of A Medium|Total Internal Reflection|OMR

Refraction|Law's Of Refraction Of Light |Refraction By Spherical Lenses|Important Terms In Any Spherical Lens

Deduce Snell's Law of refraction for a plane wave using Huygen's principle.

Explain refraction of light the basis of wave theory : Hence prove the laws of refraction. Two coherent sources of light having intensity ratio 81:1 produce interference frings Calculate the ratio of intensitites at the maxima and minima in the interference pattern.

Define Snell's law of refraction.

The second law of refraction states that (sini)/() =constant.

What is Snell's law of refraction? What does it imply?