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Fourier Transforms - what's the constant?

  1. Apr 28, 2013 #1

    At university, in a previous module the constant in front of the Fourier Transform was given as (1/2π), and the constant in front of the inverse F.T. was 1.

    However in a current module the lectrurer gives the constant as (1/√2∏), for both the F.T. and its inverse. Why is this?

  2. jcsd
  3. Apr 28, 2013 #2


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    Different people use different conventions. So long as both factors multiplied together give (1/2π), it doesn't matter.

    The specific convention only matters if you want to interpret the fourier coefficients in physical units, e.g. as a power spectrum.

    There is some logic to making both factors the same, because it makes the equations for the FT and IFT more similar.
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