Why are audio signals not transmitted by electromagnetic waves?
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Radio (and TV) waves are transmitted by electromagnetic waves that can pass through the air and walls of a house or through cables to receivers where the weak signals are amplified to produce audio sound waves within a room that enter the ear and stimulate the auditory nerves for interpretation by the brain. Audio waves move as sound waves through air as condensations and rarefactions or slight compressions and partial vacuums of gas molecules and can be stopped by the walls of a house
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They travel with the speed of light...
Hence not used.
Moreover they are deflected by electrical and magnetic fields.
They cause fluoroscence in the medium through which they pass .
They are affected by photographic plates
Hence not used.
Moreover they are deflected by electrical and magnetic fields.
They cause fluoroscence in the medium through which they pass .
They are affected by photographic plates
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