"W5DXP" napisal w wiadomosci
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On Saturday, July 28, 2012 2:59:06 AM UTC-5, Szczepan Bialek wrote:
Light is not coherent.

On the contrary, any single frequency light, i.e. single color light, is
coherent. Most of the laser light in an interferometer is coherent.
Otherwise, steady-state interference could not be achieved.

All natural sources produce the damped waves. They are not coherent at all
frequences.
Only today radio transmitter and free electron laser are able to produce
undamped waves.
S*