Talk about allusions of grandeur.
Isn't length contraction at relativistic speeds easily explained with SR? Its all in the frame of reference.
I cannot believe you just told someone else to stop and think before engaging their mouth.... I'm rolling on the damn floor over here!Originally posted by MacM
READ THIS SLOWLY AND STOP AND THINK BEFORE ENGAGING MOUTH
They probably went into this, but it depends on what you mean by 'ruler'.Originally posted by MacM
Not much grandure in knowing if a rotating frame contracts and the ruler contracts by the same amount you will get the same measurement as though it were at rest.
The circumference of a merry-go-round moves faster than the axis. Do you agree?
The circumference moves faster than a point half way between the circumference and the centre. Do you agree?
Then, according to relativity, rulers at the circumference shrink by a different factor than rulers at the centre or half way between the centre and the edge. Do you agree?
Do you therefore agree that, just maybe, rulers on the m-g-r might conceivably measure different distances depending on where they are?
MacM:
If you're standing at the centre of the m-g-r watching rulers on the edge, even though those rulers are rotating with the m-g-r you still see them as contracted.
The m-g-r pi problem was solvec about a month ago by myself, move on, I and everybody else argueing with you is right.
Geez.
Length only changes in the direction of motion (circumference). The radius does not change.
You measure radius, and the ruler is the same length (although different width) as a stationary ruler. When you measure circumference, the ruler is a different length. Then you calculate pi, and won't get 3.14~.
It's the same argument that is used for near c length contraction. The rotating frame is an accelerating frame.