Answer / Ravindra Kumar Suman

Modulation is a technique used in telecommunications to convert digital signals into an analog waveform suitable for transmission over a medium, such as radio waves or electrical cables. Modulation allows multiple channels to share the same frequency band, thus increasing efficiency and reducing bandwidth required for each channel. Here's how it works:
1. The digital signal is modulated (modified) using a carrier wave with a higher frequency.
2. The resulting modulated signal carries both the original data and the carrier wave.
3. During transmission, the modulated signal is sent over the medium.
4. At the receiver end, the modulation process is reversed to retrieve the original digital signal.

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