Recent content by tsopa

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    Why do objects reflect light (microscopic point of view)

    Hi, I can explain why objects reflect, absorb or transmit light by referring to the objects' refractive index (differnece of the refractive index of two media). I'd like to know if there is a microscopic point of vue that can explain why objects reflect light? For example * Light is...
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    How can there be interference of light rays in Bragg's law

    As we know, Bragg's law is based on the path length difference between light which interfere with themselves after being scattered from atoms in the crystal. If you google "Bragg's law", you will see numbers of pictures showing two light rays being scattered from two different atoms. Those...
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    Understanding Coulomb Force in Plasmas

    Oh I got it. Never mind! How do you delete this thread?
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    Understanding Coulomb Force in Plasmas

    This may be a pretty dumb question. How is it possible for ions and electrons to coexist in plasma state. Shouldn't be there Coulomb force between them so that they would be bound together and become atoms?
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    Ground-state energies of electron gas

    Thanks a lot. I got it.
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    Ground-state energies of electron gas

    I read from a textbook that there are two boundaries conditions that may be used in order to determine the energies of N electron system in a cube of volume V (and side a). ... (check out the attached file) ... As you can see in the attached file, the energies got by using the the two...
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