Saturday, January 14, 2012

How is it possible for information to travel within electro-magnetic energy?

I am wondering how it is possible for something like music to travel within radiowaves, and come out my reciver? I mean think of what music means in our lives, how is it possible to transelate this energy into music, or transport it through the air?How is it possible for information to travel within electro-magnetic energy?yesHow is it possible for information to travel within electro-magnetic energy?Radios work on either amplitude modulation (AM) or frequency modulation (FM) to transmit data. Variances in either frequency or amplitude of the wave can be converted into data. Microwaves are used for cell phones, and light can be used such as in fiber optics. Infared is used for TV remotes.How is it possible for information to travel within electro-magnetic energy?AM - amplitude modulation - the strength of the signal is varied slightly by the current caused in a microphone by the music.

FM - as above but the frequency varies, the number of cycles per second of the carrier signal.

Digital - the signal is pulsed in a code, the code is

decoded at the receiver.

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