- #1
jartsa
- 1,577
- 138
Let's say a train powered by electric third rail drives around without friction on a circular track, and light is shining out of the train windows, said light carries angular momentum, like light emitted from rotating or revolving things tend to do.
Where does that angular momentum come from? It must come from somewhere, as angular momentum can not be created. The train does not change with time.
Where does that angular momentum come from? It must come from somewhere, as angular momentum can not be created. The train does not change with time.