Recent content by neophysique

In a denser medium, the speed of light would be c "to all observers" inside the medium with c having a smaller value than the c in vacuum. The relativistic equations for the new medium would only apply to inertial frames that have the same density as the new medium. On the other hand, SR...

That's like saying the Earth's moon and Mars accelerate toward the Earth at the same rate.

A) acceleration would be greater. Just like in D.

you try to isolate n on one side. you are basically trying to move theta to the right of the equal sign and n to the left. to move theta you have to divide both sides by theta so that the left side = 1. Then you move the n by multiplying both sides by n. I thought this was a joke so I...

{n} = \frac{360}\theta\

If the being closes its eyes then there wouldn't be a problem.

E = pc but p is also defined as mv. So why don't photons in this Energy equation have a mass of m?

B train is moving relative to the light sources while A train is stationary, that's what that illustration shows. Since B can tell it is moving relative to the light sources by observing the A frame's results, it can deduce the actual time the lights struck its front and rear by editing out...

A1: The data on the ISS satellite shows a slower clock while the GPS satellite shows a faster clock (compared with a ground clock). Since elevation makes all clocks faster (gravitational red shift), the slower clock can be argued to be real velocity time dilation, if mechanical effects are...

Prince of Persia?

On page 204, the ISS and TopEx satellites have greater velocity time dilation than gravitational red shift so their clocks run slower. SR is an observer dependent theory and is kind of nonsense though so not sure how that velocity time dilation comes about. Could be some mechanical attribute...

I think I figured out the answer myself. Quote: "Moving clocks run slow, moving meter sticks are shortened..." Tim Halpin-Healy Theoretical Physicist Barnard College, Columbia University Well, let's apply that explanation to a test experiment with two or three or more cars...

Moving clocks run slower according to that paper. The data for GPS that shows the clocks running faster is a result of the gravitational red shift time dilation (faster) overshadowing the velocity time dilation (slower).The satellites at lower elevation is less redshifted for example and...

So how many nines does 0.999... has, if it is a number?

I think there's something illogical about comparing a number that is not complete (and which can never be complete) like 0.999... to a number that is completed, like 1. It's no different than someone claiming to know the biggest number in the infinite set of all integers. And wouldn't make...