How can the need for an array of narrow-band filters and detectors be eliminated? Options: A . &nbspBy using multi-channel excitation B . &nbspBy using a detector for each frequency C . &nbspBy reducing the number of detectors D . &nbspBy using Fourier transform

How can the need for an array of narrow-band filters and detectors be eliminated

Question

How can the need for an array of narrow-band filters and detectors be eliminated?

Options:

A . By using multi-channel excitation

B . By using a detector for each frequency

C . By reducing the number of detectors

D . By using Fourier transform

Answer: Option D
Answer: (d).By using Fourier transform

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