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Basic Relativity Stuff

  • Thread starter bfr
  • Start date
  • #1
bfr
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0

Homework Statement



I'm trying to find out how to use the formula t'=t*sqrt(1-v^2 / c^2) for time dilation.

For example, if object A were moving .8c and object B were moving .6c, would I do .8c-.6c=.2c, and substitute that in for v in the time dilation formula to find the time object B observes for object A?

Homework Equations



t'=t*sqrt(1-v^2 / c^2)
v'=(u+v)/(1+(u*v)/c^2)
 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
26,258
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To find the relative velocity you need to use the relativistic law for adding velocities. You don't just add or subtract the velocities. You quoted the formula. Now use it.
 

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