16. 3 The distribution of electric field and calculation 1. The electric field of the electric dipole l2 l2 F Electric dipole moment p=gd 816.3 The distribution of electric field and calculation @along the axis of the dipole y +oe a d/2 E-E+E-gI 4m6 -k (Z z十 2zd E 2 p z > 4z 1010 1. The electric field of the electric dipole §16.3 The distribution of electric field and calculation − + d r p Q d r r = − Q + Q Electric dipole moment p Q d r r = k d z d z Q E E E ˆ] ) 2 ( 1 ) 2 ( 1 [ 4 2 2 0 + − − = + + − = πε r r r k d z Q zd ˆ ) 4 ( 2 4 2 2 0 2 − = πε 3 4 0 2 z p E πε r r = z >> d 1along the axis of the dipole §16.3 The distribution of electric field and calculation − Q + Q d 2 z E+ r E− r o A z y