Recent content by Zephaniah

Can someone explain this sentence to me? "Any differences between Δt and proper time are not caused by differences in transit times from those space time points to an observer at rest in S." From University Physics book.

Yes, it is impossible to travel with a speed of light but take note that it is just a "What if" question. And as what I am always saying, please refer to the 2 postulates of Einstein.

Maybe it would be interesting if you ask this, What will happen if you are traveling at the speed of light and you opened your headlight? The answer would be, your headlight won't work.

I'm just explaining how did I come up with my answer.

Imagine you are in the center of a ship moving at V to the right relative to earth. You have a flashlight in your hand and two perfect reflectors on each end of the ship. A. If you turn on the flashlight will you observe the reflected light from both ends to hit you simultaneously? B. What...

Let us just apply the two postulates of Einstein.

The Question is "What will someone on Earth see?" And my answer is someone on Earth will see that the light will hit the rear part of the ship first than in front because the ship is moving at v to the right. And so therefore the light that hit the rear part of the ship will reflect first than...

Both front and rear paths will arrive back tl the flashlight at the same moment but the they are reflected are not the same. The light reflected from the rear part will be reflected first before the front.

Remember the two postulates of Einstein? First postulate: The laws of physics are the same in all inertial frames of reference. Second postulate: The speed of light in vacuum has the same value c in all inertial frames of reference

On your own inertial frame of reference, the light will hit you simultaneously because for you who is riding on a ship you are at rest and the Earth is moving. Person on Earth's inertial frame of reference: The light will hit the rear part of the ship first than in front because the ship is...

Mark Kelly to be exact.

The person on earth. But based on what I have read their research is not yet finish.

I've read a lot already. I've seen some video from NASA about the twin astronaut. And I think their study about this one is not yet done.

Thank you Sir. I hope I can understand all of these later.

I'm still confused. I'm so sorry. My brain just can't absorb these informations. :(