Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What is the physical meaning of the Fourier transform expressed at the spectral density? Also, what is the relationship between the Fourier transform and the total energy of an oscillating system? What is the role of a Dirac delta function in the process of such an understanding?

share|cite|improve this question

closed as off topic by joriki, Cameron Buie, Noah Snyder, Phira, rschwieb Nov 5 '12 at 13:56

Questions on Mathematics Stack Exchange are expected to relate to math within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

voted to migrate to – joriki Nov 5 '12 at 7:57
Why is this off topic? – user23238 Jan 13 '13 at 5:13

Here is an answer from someone who is far from an expert: The Fourier transform exposes the weight of different frequencies i.e. basis Vectors. As for the energy of a hydrogen atom the transform will give you the composed energy states of the electrons.

share|cite|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.