Репост из: Science
ᴘᴀʀᴛ-5
When Adam fires his rocket ,the acceleration causes him to be thrown back in his seat. From Adam perspective ,his spaceship is standing still, and it is the rest of the universe that accelerating. From his point of view there must be gravitational field causing the entire universe to accelerate. From his point of view it is this gravitational field which cause him to be thrown back in his seat. From his view the force from his rockets exactly balancing gravitational force,causing his ship to stay in the same place. Adam sees the entire universe attached by this gravitational field, including rays of light. Since light most be the same speed for all observers even though it is affected by gravity ,this means gravity must also affect the rate at which time flows. If Adam travels at near the speed of light ,then time on his ship will flow very slowly.
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The last Part (Part-6)
When Adam returns only few minutes will have passe for him. But many years will have passed for Sarah. From Adam perspective of view,he is standing still and it is time on earth which is moving slowly. When Adam fires his rockets to turn around he will think there is gravitational force causing him to remain still and causing the earth to accelerate towards him from his view ,this gravitational field is causing time on earth to run faster than time on his ship. This is why from Adam's point of view ,more time has passed for Sarah than for him.
...
🙂
When Adam fires his rocket ,the acceleration causes him to be thrown back in his seat. From Adam perspective ,his spaceship is standing still, and it is the rest of the universe that accelerating. From his point of view there must be gravitational field causing the entire universe to accelerate. From his point of view it is this gravitational field which cause him to be thrown back in his seat. From his view the force from his rockets exactly balancing gravitational force,causing his ship to stay in the same place. Adam sees the entire universe attached by this gravitational field, including rays of light. Since light most be the same speed for all observers even though it is affected by gravity ,this means gravity must also affect the rate at which time flows. If Adam travels at near the speed of light ,then time on his ship will flow very slowly.
....
The last Part (Part-6)
When Adam returns only few minutes will have passe for him. But many years will have passed for Sarah. From Adam perspective of view,he is standing still and it is time on earth which is moving slowly. When Adam fires his rockets to turn around he will think there is gravitational force causing him to remain still and causing the earth to accelerate towards him from his view ,this gravitational field is causing time on earth to run faster than time on his ship. This is why from Adam's point of view ,more time has passed for Sarah than for him.
...
🙂