The important property of Fourier transforms that can be expressed in terms of as follows,
Modulation Theorem
See also
Fourier TransformExplore with Wolfram|Alpha
References
Bracewell, R. "Modulation Theorem." The Fourier Transform and Its Applications, 3rd ed. New York: McGraw-Hill, p. 108, 1999.Referenced on Wolfram|Alpha
Modulation TheoremCite this as:
Weisstein, Eric W. "Modulation Theorem." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ModulationTheorem.html