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zeromodz
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If light is timeless (photons), then doesn't that mean that everything we see is just 13.7 billion year old light?
zeromodz said:If light is timeless (photons), then doesn't that mean that everything we see is just 13.7 billion year old light?
Right: it would be closer to reality to say that all light has an age of 0.K^2 said:Light doesn't age. It's proper time is always a constant, because it moves along null-geodesics.
That means from perspective of light, it's emission and absorption happen at the same time. It doesn't mean all light is the age of the universe. That right there is a strange leap of logic.
Light travels at a constant speed of 299,792,458 meters per second, according to Einstein's theory of relativity. This means that time does not pass for light as it moves through space, making it timeless.
Yes, since light does not experience the passing of time, it does not age. This is also why we can see light from objects that are thousands or even millions of light years away.
While the speed of light in a vacuum is constant, it can change when traveling through different mediums such as air, water, or glass. However, this does not affect its timeless nature.
Time dilation is a phenomenon that occurs when an object moves at speeds close to the speed of light. As an object's speed increases, time appears to slow down for that object. This is why light, which always travels at the speed of light, experiences no time passing.
In addition to light, other particles that do not experience the passing of time include photons, gluons, and gravitons. However, this concept of timelessness only applies to objects that travel at the speed of light or close to it.