How big is the universe ?

[faithless]

Hi everyone


From what I know (and I don't know much), the speed of light isn't the same in our perceivable dimensions than in other dimensions. So how can you say nothing goes faster as "speed of light", as speed of light might go faster than speed of light itself..


(sorry, I got no link to prove that, I just remember having read that engines were being tested, which purpose was to travel through the universe, being pushed by photons in other dimensions than the 3 we "know")

 

[IJesusChrist]

Hi everyone


From what I know (and I don't know much), the speed of light isn't the same in our perceivable dimensions than in other dimensions. So how can you say nothing goes faster as "speed of light", as speed of light might go faster than speed of light itself..


(sorry, I got no link to prove that, I just remember having read that engines were being tested, which purpose was to travel through the universe, being pushed by photons in other dimensions than the 3 we "know")

Lol, sounds like mathmaticians, not physicists. Math majors tend to come up with insane things like this.

The speed of light however, is... constant technically a photon has no real speed, it doesn't travel any distance, the universe is 2 dimensional, like a plane - flat in the direction of movement (thus having no distance to travel to get from 1 side to the other!) so you can either say the speed of light iis infinite or zero... depending on what you want to say about it... So, another dimension... nah.

This is probably just some far off theoretical stuff... (plus if you were to move close to the speed of light the micro and radiowave background radiation of the universe would rip your spaceship apart due to the blue-shift