# Tag Info

### Why would time distorsion be greater than space distorsion?

In the case of propagating light the distribution is about 50/50. Here I mean by 'distribution' how much time effect there is, and how much spatial effect Around 1907 Einstein explored (and published)...
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### Why would time distorsion be greater than space distorsion?

The units of space and time are tightly linked by the speed of light. In the framework of general relativity it makes a lot of sense to associate the differences in time $\Delta t$ with the quantity \$...
1 vote

### Why would time distorsion be greater than space distorsion?

The already correct answers can be summarized in one statement: "The speed of light is really fast." But to be more quantitative, we all know Wheeler's famous: "Matter tells spacetime ...
• 36k
1 vote
Accepted

### Prove a four-velocity vector lies inside of the light cone; do I just need to prove that the four-velocity is a timelike vector?

You have as the definition of proper time that it satisfies the equation $$d\tau^2 = -g_{\alpha\beta} (d\mathbf{x}(t)^{\alpha})(d\mathbf{x}(t)^{\beta})$$ for all infinitesimally separated points ...
• 50.1k

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