When this phenomenon occurs, one can determine the angle of incidence from Snell's Law.
This phenomenon works differently for left-handed meta-materials than for naturally occurring materials. A variant of this phenomenon sees ordinary and extraordinary rays when viewed through calcite; that example is known as birefringence, the double form of this. When this phenomenon occurs, one can determine the angle of incidence from Snell's Law. For 10 points, a straw appears broken when viewing it through a glass of water because of what phenomenon?
This phenomenon works differently for left-handed meta-materials than for naturally occurring materials.
{refraction} [accept {birefringence} before mention; accept {index} of {refraction} before “{ordinary}”]