The amplitude of frequency in FFT doesn't match time-domain amplitude in COMSOL Multiphysics software?

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Sorokhaibam Nilakanta Meitei

Thank you very much Sir, Harald Kirchsteiger for your kind information.

Sir, then my FFT convertion is correct or what.

Dear Sir, Harald Kirchsteige ,

Sir, Actually in the COMSOL software, time to frequency domain conversion FFT study is there so just I applied that study then automatically it comes both the real and imaginary part. Now what can I do sir.