In training examples we always do a transformation on signals which have t-scale in labeled in radians. I understand that Pi is just a number, but I still have some troubles to understanding how to relate real-life continuous signal with t-labeled in seconds.
In my head when we have real-life signal (Amplitude on time) we have full information about that signal and can determine all of it frequency components. And I know how to do it converting this signal to discrete time, but how to do it with continuous time FT?
So my question is:
could you please explain to me, ho to apply fourier transform and get frequency compnonents out of continuous signal which lengthis for example 3 seconds or something and it's aperiodic.