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Light neither experiences the passage of time nor distance. Special theory of relativity
states that as objects approach the speed of light, time slows down and length contracts
for them. As we keep increasing the speed, time further slows down until the upper limit,
speed of light, is reached - when time comes to a standstill and the distance between two
points becomes zero. Unfortunately it's not practical to check this, since nothing, except
light itself, can attain the speed of light. So this might be a little hard to get your
head around. Let's try this: "Muons" are radioactive particles
created when cosmic rays collide with molecules in upper atmosphere. Muons have an average
life time of just about 2.2 microseconds. Even travelling at nearly the speed of light
they should be able to cover only around 660 meters before they are decayed. But somehow
they do reach the surface of earth travelling thousands of kilometers. But how can this
be possible? Here's how it can explained using time dilation. According to us, on earth,
time for travelling muons has slowed down. So from our perspective, they have got plenty
of time before they are decayed. From the muon's perspective, it is at rest. But it
sees those thousands of kilometers as just 660 meters. This proves muons actually experience
time dilation and length contraction. Light, is the extreme case where time stops ticking
altogether and distance collapses onto itself. Light transcends space and time as we know
it.