VII. Motion equation for light.---[ Return home ]

When light is in motion in a simple medium where the gradient of the light speed is always parallel to one direction and changes only of magnitude in that direction, an equation of motion has already been obtained and is: .

This equation is valid for the figure below where Vx is the X component of the vectorial light (sound) speed:

.

The validity of this equation will be considered again when the hypersonic nature of light will be considered.

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