This model was considered to be the most complete emission theory.

This has come to be known as emission theory.

Another alternative was the so-called emission theory of light.

The incorrect Emission theory (vision) thus continued to dominate optics through to the 10th century.

The name most often associated with emission theory is Isaac Newton.

Adherents of emission theory cited at least two lines of evidence for it.

The following scheme was introduced by de Sitter to test emission theories:

This differed substantively from the ancient Greek emission theory.

One was the extramission or emission theory.

Instead, Majorana detected wavelength changes inconsistent with emission theory.

According to simple emission theory, light thrown off by an object should move at a speed of with respect to the emitting object.

Euclid and Ptolemy advanced the emission theory of vision, where light is emitted from the eye, thus enabling sight.

The first was the "emission theory" which maintained that vision occurs when rays emanate from the eyes and are intercepted by visual objects.

Measuring the speed of light was one line of evidence that spelled the end of emission theory as anything other than a metaphor.

Plato first articulated the emission theory, the idea that visual perception is accomplished by rays emitted by the eyes.

There are also terrestrial experiments that speak against such theories, see experiments testing emission theories.

In addition, Emission theory fails the Ives-Stilwell experiment.

Emission theory asserts that Doppler shifting of light from a moving source represents a frequency shift with no shift in wavelength.

Emission theory (vision)

Most argue that Euclid's version of emission theory was purely metaphorical, highlighting only the geometrical relations between eyes and objects.

The emission theory of sight seemed to be corroborated by geometry and was reinforced by Robert Grosseteste.

Experiments to test emission theory demonstrated that the speed of light is independent of the speed of the emitter.

Emission theories use the Galilean transformation, according to which time coordinates are invariant when changing frames ("absolute time").

Thus the Ives-Stilwell experiment, which confirms relativistic time dilation, also refutes the emission theory of light.

Electric and magnetic forces really express relations about space and time and should be replaced with non-instantaneous elementary actions (his emission theory).