- #1
spaghetti3451
- 1,344
- 34
Hey guys, I have a quick question about Fourier transforms.
I have been told that the Fourier transform of a function tells us the minimum components required to support that function and that a real pulse may have extra frequencies, but not too few frequencies.
I don't understand why Fourier transform only gives the min possible frequencies. Actually, I haven't seen the math. So I'd be glad some kind person could please give an intuition for what actually goes in a Fourier transform in relation to what I have been told.
Just one other quick question:
A Fourier transform can contain negative amplitude terms. What is that supposed to mean in a physical sense? It can also contain -ve frequency components. Is that physical?
I have been told that the Fourier transform of a function tells us the minimum components required to support that function and that a real pulse may have extra frequencies, but not too few frequencies.
I don't understand why Fourier transform only gives the min possible frequencies. Actually, I haven't seen the math. So I'd be glad some kind person could please give an intuition for what actually goes in a Fourier transform in relation to what I have been told.
Just one other quick question:
A Fourier transform can contain negative amplitude terms. What is that supposed to mean in a physical sense? It can also contain -ve frequency components. Is that physical?