Traveling faster than the speed of light, as we currently understand it, violates the known laws of physics. According to the theory of relativity, objects with mass cannot accelerate to or beyond the speed of light. However, if we were to consider a purely hypothetical scenario where an astronaut could somehow exceed the speed of light, the consequences would be beyond the realm of our current understanding.
If we were to speculate based on the principles of special relativity, which describes the behavior of objects traveling near the speed of light, there are several effects that could potentially impact the astronaut:
Time dilation: As an object approaches the speed of light, time dilation occurs. This means that time would pass differently for the astronaut compared to an observer on Earth. From the astronaut's perspective, time may slow down or even stop. The extent of this time dilation effect would depend on the exact speed and duration of the journey.
Mass increase: According to relativity, as an object with mass approaches the speed of light, its relativistic mass increases. This would require an infinite amount of energy to reach or exceed the speed of light. The increased mass could potentially have physical effects on the astronaut's body, but the specifics would depend on the unknown nature of faster-than-light travel.
Unknown consequences: Since traveling faster than light is purely speculative and not supported by our current understanding of physics, it is impossible to predict the precise effects on the astronaut's body or eyesight. The laws of physics as we know them break down at such speeds, and any speculation about the consequences would be purely hypothetical.
It's important to note that these scenarios are based on speculative concepts and do not align with our current scientific understanding. Theoretical physics continues to explore and investigate the possibilities, but until new discoveries are made, faster-than-light travel remains firmly in the realm of science fiction.