In the aftermath of the Industrial Revolution, man was able to overcome many high speeds of the creatures around him. He overcame the speed of the falcon, which reaches 300 kilometers per hour. He was the fastest living organism on earth. He was able to overcome the speed of sound in the air, which is 1224 kilometers. The clock, Felix's jump is the best witness on it.
And in the midst of surpassing those records, it collided with a huge barrier impossible to maximum speed in nature, as well as surpassing it, and even the maximum speed of human speed is a trivial in front of that barrier, which is called: speed of light!
The speed of light :
Light can rotate around the Earth 3 times per second!
At first, light can be known as an electromagnetic radiation energy, including those that fall within the range of human ability to see, and light speed is slightly affected by the presence of other elements such as air and glass, but fixed in the vacuum.
In the second half of the last century, after much precision calculations, scientists estimated the speed of light in the vacuum at about 299,952 meters per second (about 300,000 kilometers), allowing light to circulate around the planet for three consecutive times - almost - during Only one second, and based on the above, the meter was redefined in the international system of units in 1983 that is the distance that light travels in the space during 1 on 458 792 299 Seconds
you may say now dear reader: What if I can travel so fast ?!
Continue reading the article, and will surprise you answer ..
Light Year:
The light year is the distance that light travels through a vacuum within a year
Because of the vast distances between the elements of our universe of spacious planets, stars, galaxies and others, scientists adopted the so-called "light year" as a unit of measurement for those distances, and light year is the distance that light travels in the vacuum within a year ..
Well .. Unless you have a calculator can display the numbers The speed of light in the space of a whole year is equal to - I have to write the number in a new line -
800 800 472 730 460 m, or more than 9 trillion miles!
Compared to the light year, distances can be specified in minutes, hours, light days, and so on.
The sun - for example - is about 8 minutes away from us, the distance the light travels in 8 minutes, and if we assume that someone calls you from the sun - if it does not evaporate on its outskirts - if you say, "Alo, you will not be able to hear it before 8 o'clock. Minutes, and in return, your response will take the same time.
When we look at the sun we do not see it in its present moment!
In fact, when you look at the sky to see the sun, you actually do not see it as real, because the sun you see at that moment is about eight minutes too late, and so are the stars - for example, About 50 light years away, we see only the past fifty years ago, when it has long since left, or burst into a cosmic ashes or a black hole. The light from it took 50 years Until he reached the earth and we could see it, so that we could know his condition at the moment we see In it, we have to wait another fifty years!
Have you thought about how long it would take to get your response from here and with someone calling you from that star ?!
I do not think we have the age to complete the call!
What if we could travel at the speed of light ?!
Traveling at the speed of light .. Is this possible?
According to Einstein's theory of relativity, there is an inverse relationship between speed and time. The more speed, the slower the time, and the shorter the time, the more time will stop at the speed of light - in the vacuum - and the question that may come to mind. What if we can travel that fast ?!
Let's assume you own a light-speed vehicle, and you decide to travel to a star 1436 light-years away, and when you reach that star, you use a telescope to watch everything on the planet, do you know what you'll see ?!
When you turn that binoculars towards Madinah - for example - you may see the Prophet - peace be upon him - and his beloved companions prepare to fight the battle of Badr with Quraysh, or you may witness the joy of our Prophet to turn the Qibla to the Kaaba .. In other words, you see the Earth a year Second, or 623-624 AD, wherever you go on the planet, you will not see anything happening in the modern world, but you will see Earth 1436 years from now!
If you return from your journey, you will see the earth and have passed for several centuries!
Well, let's say that you soon needed to return to Earth, the planet that includes your family, loved ones, and everything that is related to you. So I decided to leave that wild, lonely star back to the planet you belong to. I do not exaggerate if you say you will be shocked by what you see when you arrive.
In fact, the Earth will then have passed several centuries since it left .. While you are only a few years old, perhaps for several days!
What happened was that time was up to you during the trip back and forth because of the speed of light your vehicle was driving, but it was not like that for the inhabitants of the planet. Because of the brief period you spent on that star, you grew a little older, Passing centuries in the distance between him and the star I was - 1436 years -!
Someone might say: What if you wanted to use the speed of light to travel on the planet ?!
What if I traveled by train running at the speed of light?
All right, let's say you went with your family to one of the train stations running at the speed of light, and then they bid you farewell at that station, wishing you safety, and they are still staring at you until the train, which quickly started.
What will happen is that you will see your family leaving the station despite the train moving, and the reason is the speed of light, which makes the train looks like it was not already in place, time stops for you and you can watch your family leave the station!
Excuse me for the digression, but ... what if that train goes faster than the speed of light, is it time to reappear?!
I will not be surprised when I answer that you will not be able to see your family only, but you will see yourself and you will be deposited at the station .. In other words, time will start to return to the past!
Finally..
In the past, examples are mere assumptions made by scientists, otherwise it is scientifically impossible for the body to meet the speed of light as well as to surpass it. If that happens, the body will immediately turn to energy, and spacecraft traveling at the speed of light in science fiction films would evaporate The ground .. You are fine.
Sources:
Light - Wikipedia
Published: 2017-07-02
This article was edited and published by: Nawar