In minerals, the Gladstone-Dale relation can be used to compute this quantity, while the Lorentz-Lorenz equation is used to relate it to polarizability. The Lensmaker's formula gives the focal length of a lens in terms of the radii of curvature of the two lens surfaces and this quantity, while Brewster's angle is the arctangent of the ratio of this quantity for each medium
In minerals, the Gladstone-Dale relation can be used to compute this quantity, while the Lorentz-Lorenz equation is used to relate it to polarizability. The Lensmaker's formula gives the focal length of a lens in terms of the radii of curvature of the two lens surfaces and this quantity, while Brewster's angle is the arctangent of the ratio of this quantity for each medium. Objects exhibiting birefringence possess multiple values for this quantity, which also gives the ratio of the sines of the angles of incident light waves in Snell's law. For 10 points, name this quantity, the ratio of the speed of light in some substance to the speed of light in a vacuum.
In minerals, the Gladstone-Dale relation can be used to compute this quantity, while the Lorentz-Lorenz equation is used to relate it to polarizability.
{Index of Refraction} [accept {Refractive Index}]