If you suddenly see that one foot has a red sock, then you know instantly, faster than the speed of light, that the other sock is green. You don’t know which leg wears which sock. (For example, let’s say a friend always wears one red sock and one green sock.
This is because the information that breaks the light barrier is random, and hence useless. Information does go faster than light, but Einstein has the last laugh. Einstein thought that this therefore disproved the quantum theory, since nothing can go faster than light.īut actually this experiment (the EPR experiment) has been done many times, and each time Einstein was wrong. If I jiggle one electron, the other electron “senses” this vibration instantly, faster than the speed of light. If I then separate them, an invisible umbilical cord emerges which connects the two electrons, even though they may be separated by many light years.
If I have two electrons close together, they can vibrate in unison, according to the quantum theory. Quantum entanglement moves faster than light. This image that hits the sphere then races across the entire sphere within a matter of seconds, although the sphere is one light year across.) Just the image of the beam as it races across the night sky is moving faster than light, but there is no message, no net information, no material object that actually moves along this image.ģ. The image from the light beam will eventually hit the sphere one year later. (Imagine that you are surrounded by a giant sphere one light year across. The problem here is that no material object is actually moving faster than light. If you wave a flashlight across the night sky, then, in principle, its image can travel faster than light speed (since the beam of light is going from one part of the Universe to another part on the opposite side, which is, in principle, many light years away).
Therefore, empty space can certainly expand faster than light.Ģ. But this only means that “nothing can go faster than light.” Since nothing is just empty space or vacuum, it can expand faster than light speed since no material object is breaking the light barrier. The Big Bang itself expanded much faster than the speed of light. Most textbooks say that nothing can go faster than light, but that statement actually should be qualified: The answer is yes, you can break the light barrier, but not in the way we see in the movies. There are, in fact, several ways to travel faster than light:ġ. One frequent question I get is whether we can break the light barrier-because unless we can break the light barrier, the distant stars will always be unreachable.
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