- #1
Jonsson
- 79
- 0
Hello there,
Given any 4-vector ##x = (x_0,x_1,x_2,x_3)##, hvor do I compute its magnitude? I couldn't find a simple explanation online.
For example I want to compute the magnitute of the momenergy 4-vector of a photon traveling in the positive x-direction where ##E## is the energy of the photon and ##P_\mu = (E,E,0,0)##. What is incorrect in the following computation of its magnitude?
$$
(P_\mu\,P^\mu)^{1/2} = (E^2-E^2)^{1/2} = 0
$$
Surely the magnitude of the vector should not be ##0##? Can you help? Thank you for your time.
Kind regards,
Marius
Given any 4-vector ##x = (x_0,x_1,x_2,x_3)##, hvor do I compute its magnitude? I couldn't find a simple explanation online.
For example I want to compute the magnitute of the momenergy 4-vector of a photon traveling in the positive x-direction where ##E## is the energy of the photon and ##P_\mu = (E,E,0,0)##. What is incorrect in the following computation of its magnitude?
$$
(P_\mu\,P^\mu)^{1/2} = (E^2-E^2)^{1/2} = 0
$$
Surely the magnitude of the vector should not be ##0##? Can you help? Thank you for your time.
Kind regards,
Marius