I heard about einsteins theory of relativity (or something), like if ur in a different planet vs on earth, one person may grow older faster than other guy? well this still doesn’t make sense to me. the way i see time is that its just a way of keeping count of somethings age. but scifi movies and einsteins theory is like saying time is affected by speed?
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Remember speed is distance traveled over time. So: miles per hour or, speed = miles/hour
Now, imagine I am on a train moving 60 mph. I bounce a ball on the table in front of me. It bounces one yard up and back down. To me, if I trace its movement, it has moved up and down in a straight line.
Now imagine you are on a train station platform and you see my train pass by. You can see the ball I am bouncing. To you, on the platform, if you trace the movement of the ball it will make and arc. Not only is it traveling up and down, it is also moving from left to right from your perspective. The distance that arc traces in longer than the up and down line I trace.
BUT…here’s the kicker, we both measure the same amount of time it took the ball to complete one bounce.
How can this be? Your clock says it took (say) three seconds and my clock says it took three seconds. But the ball you measure traveled further.
The ONLY explanation for this is that our clocks disagree (they are running at different rates).
This disagreement between clocks has been experimentally proved many, many times. Indeed, the GPS in your phone is only reliable because it accounts for this difference in clocks (the GPS satellites are moving pretty fast and that has a noticeable effect on their clocks).
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