3
1 充..1
2 . 4
3 ..4
4 .15
ⅅ15
: , , .
, , .. . .
, m n :
c=M /H, .
, , , m0 = 4p×10-7 [/]: B = m0 H.
, H, , . B = m0 H + m0 M, .
m = B / (m0 H) = 1 + c.
m×m0 = B / H = m0 (1 + c) .
c, , : -, - ; - .
. : c, , - , , . , , .
, . 105 106 .