Recent content by laurub

Is it known what the universe IS surrounded by? If not, any ideas?

a graph isn't allways read left to right, but in this case, right to left, so, something starts at 45 light-μseconds (light-microseconds), then, it moves in negative direction along the x-axes over a period of 0,000045 sec (or 45 μsec). in my understanding, v can never be c, but only approach...

Awesome diagrams and explanation! thank you for this!

You can imagine an inertial reference frame on Earth with Earth's velocity being tangent to it's curved path. but this frame would only be applicable at one point in spacetime. Don't take my word for it though, I've only just recently started looking into physics :).

allthough this thread did teach me a few new things, I can't seem to shake the suspicion that Adrian07 is a troll. I'm sorry if I'm wrong, but there's just no way to be certain.

yes, ofcourse, c is an agreed upon value describing the speed of light in vacuum. It is the speed of light that is constantly changing in a rotating frame, not the value of c. thank you.

am i correct in answering this with: No, a rotating frame is not inertial thus c will change constantly in this rotating frame

yes, A' and B' are incorrectly moved the same amount of distance as mavis is. they are probably caused by the same printing error since they both only occur in diagram b.

thank you, your response led me to seeing my mistake, i focussed so much on the arrows and waves from A' and B' that i did not see the arrows and waves from A and B, and this somehow led to my mistake. I no longer think the images are confusing. EDIT I got confused because A' and B' in image...

i have a question about chapter 37.2 relativity of simultaneity (pearsons international edition university physics, 12th edition) . the text besides image b sais: inside the train, mavis moves toward the light coming from the front of the train and away from the light coming from the back of...