Why does light leave the position from which it is created?
An accelerated electric charge causes ever moving waves of energy travelling at the speed of light, according to the laws of physics.
Asked by: Jack Stecher, Dallas, Texas
Light is a manifestation of the laws of electromagnetism, which show that whenever sources of electric charge – such as electrons – are accelerated, the resulting energy is converted into waves of electromagnetic energy that travel outward from the source at the speed of light.
In other words, it’s impossible for light to stand still – the laws of physics decree that it’s always on the move.
Robert is a science writer and visiting professor of science at Aston University.