What is r_s ?

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r_s is the radius of a sphere volume equals ...
what is volume per conduction electron?
 

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  • #2
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what is this volume like?
 
  • #3
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what is this volume like?
Volume is like another other volume, it's a 3D region of space. In this case the region is taken to be sphere of radius r_n. And within that volume you have N number of conduction electrons.

Divide that and you get a density of conduction electrons per volume or vice-versa.
 
  • #4
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"Divide that and you get a density of conduction electrons per volume or vice-versa."

divide what?and by what?
density is a mass divided by volume
there is no such thing here
 
  • #5
sophiecentaur
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Density, in this case, refers to the number (not the mass) per unit volume. It (or the reciprocal) tells you how much room a conduction electron has 'to itself' or the space between conduction electrons.
When we talk of Population Density, we don't mean the Mass, either. It's a fairly common English / Technical use of the term density.
 
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