Re: Q: relativistic velocity

In article
<a801130c-8659-40f1-9a21-719184f53dec@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
mark_horn@xxxxxxxxxxxxx writes:

At what point do we begin referring to velocities as relativistic?
Would, for example, 1% of light speed be considered relativistic?

I don't think there is any standard definition. Even if there were, it
wouldn't be of much use, because it depends on context. If relativistic
calculations (or, if the relativistic effects are small, relativistic
"corrections"---perhaps not proper full-scale calculations, but rather
adding terms from a series expansion or whatever) are important for what
you are interested in---meaning that if you neglect them, you care about
the difference between the non-relativistic and relativistic
calculation---then the velocity is relativistic. If not, it is not.
This will depend both on the accuracy you are interested in and also on
what order in v/c the effect in question shows up.

.

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