> Is there any empirical evidence that electromagnetic radiation > produces gravitational fields? I understand that as a form of energy > it is expected to induce a spacetime curvature, but has this > prediction of GR actually been tested? It is known that a light beam is deflected by the ...
In ordinary photography, the amplitude of the light wave is recorded on the photographic film. In holography, both the phase and amplitude of the light waves are recorded on the film. The resulting photograph is called hologram. 6.4.6 MASER The term MASER stands for Microwave Amplification by ...