Time is relative as you all know and we all accept it and those of you who don't know how let me explain you
Eg: Suppose there is a train that moves way way faster like nearly at the speed of light (moving right as shown) and you are on the middle of the train and you see two lightning bolts at the side of the train and there's a observer at front sth like this.
Lets say lightning bolts hit the ground simultaneously so which one will you see first? (as an observer)
Obvious answer will be both but that's not true as you are traveling towards right nearly at speed of light you will see the right bolt because your near to that one and farther to other the right lightning bolt will be reflected fast to your eyes than left so you will see the right bolt first and then you will notice left bolt after some time.
But to an observer (as he is in rest ) he will say that both hit the ground at the same time so for two observer time is diff but not const as it is relative.
I know you didn't understand the first eg so let me tell you 2nd one which is way easier
Eg: Let say the light of sun takes 8 min to travel to earth so the sun you see now is 8 minute old (we see light as object ) . Similarly the light of sun takes 10 min to travel to Jupiter also the sun you will see from Jupiter will be 10 mins old. So what if sun blasts at 10:00 am the people in earth will say that it exactly blast at 10:08 am ( 8 min to travel light) but the people in Jupiter say that it blasted at 10:15 am?
So which one is correct?
Technically both, the time is relative to both observer it is because the light took more time to reach to Jupiter than earth so speed made the time change hence it is relative
