If you travel at the speed of light underground for 1 year what time would it be?
- Posted:
- 3+ months ago by doctor time
- Topics:
- speed, light, underground, travel, year, years, time
Answers (2)
You can't travel at the speed of light as you would become infinitely massive, the entire universe and beyond, and time would pass infinitely quickly so you would, at once, be at the end of time. If you travelled close to the speed of light, though, you'd get a cut down version of these effects.
Travelling at half the speed of light would give you a 15% increase in speed so you'd be two months behind everyone else (for a year's travel). If you travelled at 90% the speed of light, people would be over a year ahead of you for every year you travelled. You would also have over twice the mass you currently have, and be over twice as small.
If you travelled at 99.99% the speed of light, 70 years would pass for people for every year that passes for you. You would come back and be the same age as your own grandchildren.
I think they're talking about time dilation effects where the flow of time alters as you get close to the speed of light. A year for them isn't the same as a year for us.