If in the future, people actually successfully build a spaceship that can travel at the speed of light, what phenomenon will the people sitting on the
Before the 1900s, the world firmly believed in Isaac Newton's view of matter and gravity. However, in the 20th century, Albert Einstein appeared and changed this world forever.

Einstein's Theory of Relativity:

Einstein's Theory of Relativity cleared up many doubts about mass and energy. The mass-energy equivalence equation proves that mass and energy are mutually convertible, meaning that mass can be converted to energy and vice versa.

He proposed no standard frame of reference. Everything is relative - even time. From this it follows that the speed of light is constant and does not depend on the observer. Therefore, if a person is moving at half the speed of light and in the same direction as it, the beam will appear as if it were a stationary person.

Energy-mass equivalence:

Energy-mass correlation means that if an object moves at 10% the speed of light, its mass will increase by 0.5% from its original mass. On the other hand, if an object moves at 90% of the speed of light, its mass will be 2 times its original mass.

Can we travel at the speed of light?

We cannot go at the speed of light.

You see, if an object moves at the speed of light, its mass increases exponentially! Consider the speed of light is 300,000 km/s and when the object moves at this speed, the mass of the object becomes infinite. Accordingly, the energy required to move the object is also infinite, which is completely impractical.

That's why no object can travel at or faster than the speed of light.

What if you traveled close to the speed of light?

In the case that humans can travel as fast as the speed of light, i.e. 90% of the speed of light, interesting phenomena will occur.

First, a person moving at such speed will feel time slow down. For that person, time will pass more slowly than for someone who is not moving. For example, if a person is moving at 90% of the speed of light, it will feel like 10 minutes have passed, while a person standing still will experience 20 minutes. Time will be cut in half.

Another thing is that your vision will change dramatically. The sight in front of the cruise ship you are sitting on will look like a deep tunnel. The stars in front will be blue and the stars behind will be red. This is because light waves from stars in front of you will cluster together, making objects appear blue, while light waves from stars behind you will spread out and appear red. , causing the extreme Doppler Effect.

After a certain speed, you will only see black because the wavelength of light entering your eye will be outside the visible spectrum.

Traveling at the speed of light is perhaps unthinkable, but if humans can actually experience this, it will certainly be a memorable experience for a lifetime.
Axact

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