Horace Heffner wrote: > > On Feb 4, 2006, at 11:32 AM, Harry Veeder wrote: > > >> In EM theory a body with some charge and with motion which is >> initially >> uniform and in a straight line will be deflected by the appearance >> of a >> magnetic field. > > Yes, assuming of course you do not mean the charge's own field. This > deflection is caused by the analog to the Lorentz force. I would > replace "by the appearance of" with "in the presence of", since > fields do not just appear from nothing and without effect.
Well...when an electromagnet is turned 'on' a magnetic field appears. Perhaps there is a construction which can make a gravimagnetic field appear. > >> If the isomorphism between Gravity and EM holds, then a body with >> some mass >> with the same initial motion should be deflected by the appearance of >> gravimagnetic field (not a gravity field) , > > Yes, again with the same caveats. > > >> but it appears to be only true >> if the body is initially rotating too. > > No. The deflection can be due solely to the Lorentz force. However, > if the gravimagnetic field is not uniform, then a spinning body can > also be deflected by the gravimagnetic force. In a uniform > gravimagnetic field a spinning body, in motion or not with respect to > the gravimagnetic field, is only made to precess due to its > spinning. A spinning body is deflected by the Lorentz force just > like a non-spinning body. ok. Harry >> >> Have I misunderstood the meaning of isomorphism or something about the >> theory of gravimagnetism? > > Your understanding of EM may be a bit off, if I understand your > questions. > > Horace Heffner >
