Lorentz Transformation Rapidity

[parsikoo]

Concerning Rapidity, if tanh(Fi) = v/c, can it be concluded in general that the relative angle of two frames in combination with Lorentz Transformation is tan(theta) = tanh(Fi) = v/c, where theta is the relative angle?

 

[Fredrik]

What do you mean by the "relative angle"?

 

[robphy]

Yes,
$\theta_{21} = \theta_{20}-\theta_{10}$.

 

[parsikoo]

What do you mean by the "relative angle"?

I meants relative angle of the frames.

 

[Fredrik]

I meants relative angle of the frames.

That's what you said but what does it mean?

 

[parsikoo]

Simply the math connection between rapidity and the angle of two frames, not sure if this is clear?