If an object were able to travel at the speed of light, it would experience the phenomenon known as time dilation. According to the theory of relativity, as an object approaches the speed of light, time slows down for that object relative to an observer at rest. From the perspective of the object traveling at the speed of light, time would effectively stand still.
Therefore, if you had been traveling at the speed of light since your birth, from your perspective, no time would have passed. You would perceive yourself to be at the same moment when you started your journey. However, from the perspective of observers on Earth or any other reference frame, an enormous amount of time would have passed.
In terms of distance traveled, the distance you would have covered depends on the amount of time observed by an external observer. Let's assume we have a reference frame observing your journey from Earth. In this case, if we consider your average lifespan to be around 80 years, and assuming you were traveling at the speed of light for the entire duration, we can calculate the distance traveled using the formula:
Distance = Speed × Time
Since the speed of light is approximately 299,792,458 meters per second, we can multiply it by the number of seconds in 80 years to find the distance traveled:
Distance = 299,792,458 m/s × (80 years × 365.25 days/year × 24 hours/day × 60 minutes/hour × 60 seconds/minute)
Calculating this, the distance traveled would be approximately 2.377 × 10^17 meters, or about 237.7 trillion kilometers. Keep in mind that this calculation assumes constant velocity and does not account for the effects of acceleration, which are not possible to achieve for massive objects traveling at the speed of light according to our current understanding of physics.