Time - A Matter of Perspective?

The experience of time is not fixed and is an immutable entity. Even in the case of humans, we embody time on multiple scales at any given moment. The circadian rhythm tells us the sleep and waking time, ultradian rhythm, the timing of sleep stages, and milliseconds that the brain necessarily has to clock, which is crucial for motor control and speech. There is the 'normal' time, which we measure in hours, minutes, days, weeks, months, and years.  For the part of the brain that participates in speech, time longer than a millisecond is inconceivable as it wouldn't know anything other than its internal clock exists.  The feeling of time varies; we feel like waiting to see the paint dry or sometimes accomplishing many things within a short period. Within ourselves, we carry multiple perspectives and points of view over time.

Light, having a dual nature, is also considered a massless particle. A photon is emitted from the surface of the sun, travelling at 300k km/sec before it lands on our face. As we measure it here on Earth, it takes 8 minutes and 20 seconds for the photon to journey 150 Mn kilometres, the average distance between the sun's and Earth's surfaces.

The interesting question is, if somehow a photon could, how would it perceive time? distance?

We know from Einstein's theory of special relativity that time slows down relatively as the object's relative speed increases. In fact, as the 'object' approaches the speed of light, time stops still. As we know photon is travelling at the speed of light as it leaves sun's surface, hence from its perspective, time has stopped still. It has left the sun's surface and landed on the face of the earth at the same time. Conversely, one can think of the absence of distance, arriving on Earth in the same instance it left the sun. As no time has passed for the 150 MN kilometre journey, from the photon's point of view, it originated from the sun and on our face simultaneously. 

POV matters. It matters the most, in almost all walks of life.

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