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Radio waves can be changed by a process called?
By altering the properties of space, a radio wave may be directed or reflected. Your average radio aerial does this, and a yagi aerial (typical TV antenna) also is configured to ignore signals from certain directions. [Thus giving a better signal-to-noise signal. ]Once captured in a wire conductor, the radio wave may then be amplified, and rectified (detected) or otherwise processed.Frequency Modulation (FM) changes radio wave frequency, normally used to correct atmospheric and relative motion changes to accurately recreate the original signal.The quantum process is called 'Atomic Scattering'. Particles absorb signals and re-emit them (equivalent to electrons absorbing photons and remitting them - in QED).The effect is Doppler Shift, where wavelength and frequency (subject to observer frame) are altered to maintain the (EM signal or 'light' speed) 'c'. Look up Bragg refraction, PMD, and Raman and Stokes / Anti Stokes (up and down shifted) scattering for more detail.PJ
