Natural Science Forum / Physics / General Physics / June 2007

Who cares?

   Ken, this is the same old sh.t, and it is wrong--not in agreement
   with the results of observation and experiment. For example,
   consider two entities, A and B, experiencing relative motion
   such that each measures dv/dt = 0 and c > |dr/dt| >> 0 with respect
   to each other.

   Consider observer A.  A will *measure* B's clock to run slow.

   Similarly, B will *measure* A's clock to run slow. And, of course,
   this is expected due to the symmetric relationship between A and B.
   The degree of *measured* time dilation is exactly as is predicted
   by Einstein's special relativity.

   Now let's put some numbers to this. Let |dr/dt| equal 10000.0 km/s.
   Then A will measure B's clock to run slow by a factor of 1.00056,
   and B will *measure* A's clock to run slow by a factor of 1.00056.

   Each measures the other's clock to run slower than her own.
   Furthermore, Ken, time dilation can come from relative velocity *and*
   from gravitation. Sometime we have to deal with both.

 Have it printed on soft paper, perforated and spooled onto cardboard
tubes, then send me a case.