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The special theory of relativity describes the motion and dynamics of objects moving at significant fractions of the speed of light.

4 votes
1 answer
2k views

What is the velocity of a photon through space-time? What is the 4-velocity of a photon?

What is the velocity of a photon through space-time? What is the 4-velocity of a photon?
girlphysicsmajor's user avatar
2 votes
2 answers
66 views

Consider a cylindrical mass in empty space. In general relativity, do the space-time dimensi...

Consider a cylindrical mass in empty space oriented along the x1 direction. In general relativity, do the space-time dimensions (x1, x2, x3, x4) curve about the mass in a completely symmetrical manne …
girlphysicsmajor's user avatar