Explain what modulation and demodulation is

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Modulation is the process of varying a carrier signal to encode information, while demodulation is the reverse process that extracts the original information from the modulated signal. This is essential in radio stations to transmit audio signals over long distances without interference. In fiber optics, modulation involves converting electrical signals into light signals for transmission, and demodulation converts them back into electrical signals at the receiving end. Techniques like amplitude modulation (AM) and frequency modulation (FM) are commonly used in radio, while optical modulators are employed in fiber optics. Understanding these processes is crucial for effective communication technologies.
sanado
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Hey guys, was just wondering if you could explain what modulation and demodulation is and more importantly, why it needs to occur in things such as radio stations.

Also, can you also explain how modulation and demodulation occur when fibre optics are involved?
 
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