Have the photons also gone back in time nearly 90 years?I hope they were paying Road Tax
Have the photons also gone back in time nearly 90 years?
Physical laws do not equal mathematical calculations.. In an case an observers frame of reference from two light beams would be the centre of the gap. So it's light speed from the left and right relative to the centre.
No because that where relativity comes into play.. Because time and space are linked the faster you go the slower time ticks. So person on Photon A would be going the speed of light relative to another outside observer but to him time would stop then the speed of Photon B is the speed of light not twice.The observer may be sat upon Photon A but then I suppose he is observing the approaching Photon B with a closing velocity of twice the speed of light.
Two photons travelling towards each other. Each travelling at the speed of light. To an observer, the gap is closing at twice the speed of light?
Answer:
A; Yes
B; No
C; My brain hurts.
D; Never mind all that stuff, What's for me tea?
Well yes this is the only vaguely correct answer so far that actually takes relativity into account. Where is the observer?well none of the above .. as there travelling the speed of light you could never observe them
Many parts of the universe are already moving away from us at speeds far in excess of the speed of light such that no information (for example light) from thoose areas will ever reach us. An observer in between us those points may be able to 'observe' that the two points appear to be moving away from each other at faster than the speed of light from their relative postion.