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B How is mass converted and released as energy?

  1. Mar 2, 2016 #1
    How is the mass defect from a nuclear reaction created?
    Thanks for the help :)
  2. jcsd
  3. Mar 2, 2016 #2


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    Gold Member

    Something relatively more complex emits photons and becomes relatively simpler / loses mass in the process.
  4. Mar 3, 2016 #3


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    Staff: Mentor

    Physics cannot answer "how" questions on a fundamental level.
    Mass is "just" a type of energy. One type of energy is converted to a different one.

    @Grinkle: fusion is a nuclear reaction as well.
  5. Mar 3, 2016 #4


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    mfb - good reminder, thanks.
  6. Mar 3, 2016 #5
    Thanks you
  7. Mar 9, 2016 #6
    in regards to mfb's statement about "how" statements:

    i thought "why" was the question to shirk away from. i think differentiating "how" from "is" is somewhat semantic. "how" connotes an explanation, whereas "is" is book keeping; so i may venture to say that "how" is epistemological whereas "is" is ontological. but i suppose one may ask "how" ad infinitum just as one can with "why", and there seems to lie the rub.
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