4 ms·
What still blows my mind is the fact that the Speed of Light is a constant. Meaning: if you're on a train moving a 0.9c, any light emitting from you will STILL
by jameskilton 17y ago
What still blows my mind is the fact that the Speed of Light is a constant. Meaning: if you're on a train moving a 0.9c, any light emitting from you will STILL travel at c in your reference frame, while at the same time an observer outside of the train will also see the beam of light travelling at c.
As for time dilation, it's a very simple formula called Lorentz Contraction: http://en.wikipedia.org/wiki/Length_contraction http://en.wikipedia.org/wiki/Length_contraction. At 0.99996c, you can cross the Milky Way (100,000 ly) in one year.