According to the principles of special relativity, as an object's speed increases and approaches the speed of light (c), time dilation occurs, meaning time slows down for that object relative to a stationary observer. For a hypothetical object traveling exactly at the speed of light, time would effectively stop. From the perspective of a photon, which is massless and always travels at the speed of light in a vacuum, the distance between any two points is zero due to length contraction, and the time taken to travel that distance is also zero due to time dilation. Its entire existence-from emission to absorption-is a single, instantaneous event, illustrating the profound and counter-intuitive nature of the universe as described by Einstein's theories.  For a photon, time stands still. Traveling at the speed of light, it experiences no passage of time, no matter the distance it covers. From a photon’s perspective, emission and absorption are instantaneous events, revealing the strange and fascinating nature of relativity. Read more from here...