24
大 学 物 理 第22卷
Adiscussionontherelationbetweenthegravitationaffectingthe
SunintheGalaxyandthedistancertothecenteroftheGalaxy
XIAOBo2jun
(DepartmentofPhysics,ChengdouTeachersCollege,, Abstract:Thedistributionofthestrengthoftheinandthere2
lationbetweenthegravitationaffectingtheSuninandrfromtheSuntothecenteroftheGalaxyarediscussed.Thenotinverselyproportionaltothesquareofr.ItispointedoutofthesizeandshapeoftheGalaxyandtheconditiongravitationisusedisemphasized.
K:;theofthestrengthofthegravitationalfield;inverse2square
(上接8页)
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Notesonthevacuumdisplacementcurrent,Maxwell’sequations,thesourceofanelectromagneticfield,andJefimenko’sformulas
ZHUHong2yu,XIEShi2chong
(NeijiangTeachersCollege,Neijiang,Sichuan,641002,China)
Abstract:Theelectromagneticfieldisanindivisiblewhole,Maxwell’sequationsaretheequations
ofmotionoftheelectromagneticfield,Thesourceofanelectromagneticfieldisadistributionofelectricchargeandcurrent,andtheJefimenko’sformulasaresolutionsofMaxwell’sequationsinvacuum.
Keywords:electromagneticfield;Maxwell’sequations;Jefimenko’sformulas