This quantity in two materials can be compared using the Becke line test.
This quantity in two materials can be compared using the Becke line test. This quantity can take on three different values in biaxial materials, and it is related to wavelength in Cauchy's (koh-SHEEZ) equation. This quantity is almost constant in fused silica, and equals the cosecant of the critical angle of a material. This measure varies inversely with both the speed and the wavelength of light within a medium, with its lowest possible value, one, used for vacuums. Name this quantity used in Snell's Law, the ratio of the speed of light in a particular medium to the speed of light in a vacuum.
This quantity in two materials can be compared using the Becke line test.
index of {refraction} [or {refractive} index; prompt on {n} before the end; prompt on a partial answer]