Origin of refractive
Examples from the Web for refractive
Generally the two spherical surfaces enclose a glass lens, and are bounded on the outside by air of refractive index 1.
Although the ratio of the sines is constant, the refractive index varies in different media.An Elementary Text-book of the Microscope|John William Griffith
The refractive indices of jargoon are much higher than those of tourmaline (see Zircon).
The refractive index of the liquid for the D sodium ray is 1.2236.
These angles can be definitely altered for different materials, according to their refractive indices.A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public|Frank Bertram Wade