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Fourier transform for beginners?

  1. Apr 23, 2013 #1
    Hallo,

    I really don't understand Fourier transform.
    Do somebody know a good book for beginners?
    Something like fourier transform for dummies or so?

    I need it just for physics.
    So it don't have to be to mathematical. ^^
    THX
     
  2. jcsd
  3. Apr 23, 2013 #2

    Simon Bridge

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    I'm afraid it has to be mathematical: the language of physics is maths.

    The fourier transform is just this:

    ##F(\nu)## is the fourier transform of ##f(t)## if $$F(\nu) = \int_{-\infty}^\infty f(t)e^{-2\pi i\nu t}dt$$

    That's it!

    The rest is exploring the consequences.
    You should start by finding the Fourier transform of ##f(t)=A\sin\omega t## ... I'm afraid you just have to do the math until you get it.

    In a nutshell - you know how any function can be written as a sum of sine waves?
    The Fourier transform is part of that.
     
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