Recent content by asdf1

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    Solid State Physics (Ashcroft/Mermin)

    Homework Statement For the 1st problem, part (b) at the end of chapter 1, I am not certain what the question means. The question is " In the Drude model the probability of an electron suffering a collision in any infinitesimal interval dt is just \frac{dt}{\tau}. Show that the probability...
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    Recombination of plasma ions and electrons

    If plasma is a collection of positive ions and electrons, why don't they recombine together and become neutral?
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    How Do You Complete a Ray Diagram for an Optical Microscope?

    thank you very much!
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    Understanding Momentum Transfer as a Tensor in Newton's Law of Viscosity

    thank you very much!
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    Understanding Momentum Transfer as a Tensor in Newton's Law of Viscosity

    What does it mean by momentum transfer is not a vector (3 components) but rather a tensor (9 components)?
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    How Do You Complete a Ray Diagram for an Optical Microscope?

    Homework Statement For an optical microscope, complete a ray diagram for an objective lens and relate the relate the relative distances to the lens equations. If you want to increase the magnification, should the objective lens have a shorted or longer focal length (illustrate this on the same...
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    What's the difference between a superlattice, lattice and sublattice?

    thank you very much!
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    What's the difference between a superlattice, lattice and sublattice?

    What's the difference between a superlattice, lattice and sublattice?
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    Reflecting and limiting sphere in diffraction

    Understanding a little better, but it's still hard to picture things~
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    Reflecting and limiting sphere in diffraction

    What is the purpose of the reflecting and limiting sphere in diffraction?
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    Calculating Planar Density for FCC {100}, {110}, {111}

    ^_^ Thank you very much for explaning that very clearly!
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    Calculating Planar Density for FCC {100}, {110}, {111}

    HOw od you calculate the planar density for {100}, {110}, {111} for FCC?
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    The Meaning of R in hR10 for Pearson Symbol

    ok! thanks a lot~
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    Small Angle Scattering: Electrons & Angles

    Thank you so very much for again explaining my questions in so much detail! ^_^
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    Small Angle Scattering: Electrons & Angles

    That makes sense. Then why is it okay in general physics to assume that a head on collision doesn't lose energy?