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Where does the energy come from

  1. Aug 2, 2013 #1
    When electrons orbit the nuclei of an atom doesn't that take energy and where does that constant flow of energy come from?
     
  2. jcsd
  3. Aug 2, 2013 #2

    Simon Bridge

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    Consider the related question: "When planets orbit a star, doesn't that take energy and where does that constant flow of energy come from?" Can you answer that one?

    However - the question includes some common misunderstandings:
    - Electrons do not orbit nuclei - that is an old model still used for teaching purposes.
    - You do not need "a constant flow of energy" to move in a circle.
    - when a free electron becomes bound to a nuclei, it loses energy, the lost energy gets stored in the electromagnetic field.
     
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