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: ,
\frac{dq}{dV}

L3TI

/3

  , , , , , : [/], [/²] [/³], . , , , , .

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, , \lambda (\vec r), \sigma (\vec r) \rho (\vec r), ,  \vec r   -. :

 Q = \int\limits_L \lambda (\vec r) \operatorname{d} r
 Q = \int\limits_S \sigma (\vec r) \operatorname{d} S
 Q = \int\limits_V \rho (\vec r) \operatorname{d} V

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, , ,  \psi(\vec r), :

 \rho(\vec r) = Q |\psi (\vec r)|^2

:

  \int |\psi (\vec r)|^2 \operatorname{d}V = 1

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