Ptolemy discovered a principle similar to it, but it was only supported when he fudged the data to fit his expectations.
Ptolemy discovered a principle similar to it, but it was only supported when he fudged the data to fit his expectations. When involving monochromatic beams, it can also be expressed using wavelengths, instead of the usual parameters. It generally only holds in isotropic media such as glass, with birefringence occurring in anisotropic materials such as calcite. It follows from Fermat's principle of least time. Consequently, it can also be explained by the Huygens principle. It relates the ratio of the velocities of a light beam is passing to a specific constant. FTP, name this law in optics, which states that the ratio of sines of the angles of incidence and refraction is equal to the opposite ratio of the indices of refraction.
Ptolemy discovered a principle similar to it, but it was only supported when he fudged the data to fit his expectations.
{Snell's law}