Quote:
Originally Posted by ila
I cannot completely agree with you, sesame. Radio waves are always considered to start in the VLF range 3 - 30 khz (3 x 10^3 at the lower end). Anything below that is audio frequencies and frequencies at 3 x 10^1 and 3 x 10^2 are audible to humans.
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Dear friend,
We are talking about Light here. Light is
ELECTRO MAGNETIC RADIATION. It
doesnt need any medium to travel through.
Sound is
NOT an ELECTRO MAGNETIC RADIATION. It is only the vibration of the particles of a medium. Its a form of energy though. It
cannot travel without a medium.
Human Audio range is between 20 Hz to 20,000 Hz. So, even though 30Hz sound overlaps with 30 hz Radio wave, we cannot hear a radio wave, because it doesnt vibrate air.
Light and Sound are two different things.
