On Monday, January 13, 2025 at 10:21:28 PM UTC-7 Brent Meeker wrote:
On 1/13/2025 9:02 PM, Alan Grayson wrote: Using the LT, we have the following transformations of Length, Time, and Mass, that is, x --->x', t ---> t', m ---> m', where the primed quantities are the transformed values in the primed frame, given their values in the unprimed frame. The question is this; which of the quantities in the primed frame are actually measured in the primed frame, and which are appearances in the primed frame as seen by unprimed frame? All of them. That's why it's *relativity* theory. x and t are measurements in one frame and x' and t' are measurements in another frame moving *relative* to the unprimed frame. And note the use of "measurements" not "as seen". The two are different when you consider things moving at a significant fraction of the speed of light. *But length in primed frame is contracted from the pov of unprimed frame, but in primed frame it isn't measured as contracted, so it APPEARS contracted from the pov of unprimed frame, but NOT measured in primed frame. Same with time and mass? AG * How is this consistent, if it is, with the fact that when doing EM measurements, E' and B' are the actual measurements of the fields in the primed frame, given that E and B are measured in the unprimed frame, but the same cannot be said of some, or all of the measurements of Length, Time, and Mass? TY, The same applies except the electromagnetic field is a tensor, so it transforms by tensor like a sequence of LTs. How is that not consistent? Brent AG -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/55f28d15-9010-478c-ae4d-e44cddfca3d7n%40googlegroups.com.
