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Sur Face Waves: In addition to sur face wavesface waves, oceanographic studies have detected internal waves, in which the water at great depth in the oceans moves up and down some hundreds of meters. Apparently, the ocean has its own weather system in which subsur face wavesface masses of water containing fronts and inversions—much as the atmosphere—move horizontally over large distances.
The next decade should see many innovations in oceanographic research.
The various forms of electromagnetic radia-: tion differ from each other chiefly in terms of the frequency (or the wavelength) of the waves. Each form occupies a range of frequencies within the electromagnetic spectrum. In terms of increasing frequency their order is: radio waves, infrared waves, visible-light waves, ultraviolet waves, X-rays, and gamma rays. This difference in frequency has important consequences; for instance, visible-light waves are sensed by the eye, but radio waves are not. See also
Gravitational Waves. Einstein's theory predicted the existence of gravitational waves. Like electromagnetic waves, these waves propagate at the speed of light. They should be given off by double stars and by collapsing or exploding stars. |
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