Why Light-Speed Travel Remains Beyond Human Reach

by John Agbo, age 13

People often ponder what would happen if humans traveled at the speed of light. However, it is worth asking: is this even possible?

Some problems arise when trying to reach light speed. As humans, we are not able to withstand more than four to six times the force of gravity, also known as g-force. To accelerate to the speed of light would require immense energy, and any human attempting it would experience dangerous levels of g-force, potentially causing fatal damage. Even more challenging, the closer an object gets to the speed of light, the more energy it needs to continue accelerating. Eventually, it would require an infinite amount of energy to reach light speed, which is impossible under the current laws of physics.

As an object with mass approaches light speed, its mass increases, and at the speed of light, it would theoretically have infinite mass—another impossibility. This is why only particles with zero rest mass, like photons, can travel at the speed of light.

Unfortunately, reaching light speed quickly would be impossible for humans, but even a gradual approach has its limits. While we could hypothetically accelerate at lower g-forces over time, no method would allow an object with mass to reach the speed of light.

In theory, to travel at light speed, we would need technology far beyond our current understanding. Concepts like negative energy or warp drives have been speculated, but they remain in the realm of theoretical physics and science fiction. For now, the laws of the universe seem to prevent us from achieving light-speed travel.

[Source: Space.com; Illustrated Dictionary of Science]