Electromagnetic waves are ... the world often has the same clarity as one from next door. This is called accurate signal regeneration. Radio waves: one of the few known effects of radio waves ...

All forms of electromagnetic radiation ... Every photon is characterized by wavelength (the distance from the crest of one wave to the crest of the next wave), by frequency (the number of wave ...

Researchers at ETH Zurich have managed to make sound waves travel only in one direction. In the future, this method could also be used in technical applications with electromagnetic waves.