Understanding sampling theorem

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gobi1990

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An analog signal is sampled at duration of T second, after that we get sampled time domain signal. FT of that sampled signal gives spectrum.

What is that spectrum.? For one time sample in TD, gives one spectrum.?
 

FT gives us the frequency components which make that sampled signal.
Take analoge signal as menue card take sampled signal as a one whole dish from that menue card and FT as ingredients of that dish it is the simplest analogy
 

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