How time travel will be possible in future? - Time Dialation - truesciencebehindscience

Time Travel. What do we mean by this term? Normally, it just means traveling into our future or past. In this world, imagining time travel seems a very interesting and simple topic. But the science behind it is very complicated. Today we will know about Time Dilation. For now, let's find the science behind science -

In 1905, the great scientist Albert Einstein released his famous Special theory of relativity. This theory changed the mind of every person. Before this everybody thought that time runs at an equal speed at every position in the universe. But, the theory satisfied that every place time did not flow at the same rate. According to this theory, the time differs due to -

• Gravitational Time Dilation

• Speed Time Dilation

Gravitational Time Dilation-

In Gravitational time dilation, the object which bends the spacetime most (i.e has a bigger mass) has the slowest time and the object which bends the spacetime least (i.e has a lesser mass) has the fastest time. For example when we go near a black hole, which has the highest mass and it bends the space, the most, the time goes slow. Moreover, there are theories that inside the black hole the time does not exist. Time gets stopped there.

 I am expecting that you all will be thinking about any real example of this. So, here it is, The satellites in space are loosely affected by the gravitation of earth but we on earth are highly affected by it so, the time in the spaceship gets slow Hence they are fitted with an atomic clock because the atomic clock is more accurate than the GPS ones. The time has to be corrected every day. However, the change is not noticeable for us but when any person spends his 6 months in the ISS then he is 0.05 seconds younger than the people on earth.

Speed Time Dilation -

Understanding speed time dilation is a bit difficult because this is somewhat related to mathematics. Before we should start we should know some small things which will be used in it -

•     The speed of light does not depend on any relative motion for example we are traveling in a train at a speed of 200 m/sec and then switch on a torch (in the direction of motion of the train) then the speed of light will not increase by 200 m/sec. I mean the speed of light will not be c+200 m/sec it will be just c.

•   For example, running in that train our speed will be 200 + 1 m/sec. But, unlike this condition speed of light does not change. So, it concludes that the maximum speed in our universe is c which is of light. This sounds very much weird, but the truth is truth. This theory is being verified by scientists.

For now do not wander out of the topic let's begin the concept of time dilation:-

 Consider a rocket moving with almost the velocity of light. Inside the rocket, there is a set up like the below figure:-

Figure 1

Here the sensor senses light when it touches point B so, it calculates the distance twice. When this set up moves with a velocity then, the person in the vehicle will think that this light is just going straight but the person outside the vehicle will see the image as -

Figure 2

From the perspective of the person outside the vehicle, the light will travel a longer distance comparing to figure 1. In figure 1 light travels From Point B to A then to B it means distance will be 2h and in figure 2 light travels from the point X to point Y then to Z. As we can see here the distance followed by light in figure 1 is lesser than the distance followed by light in figure 2.

However, the speed of light = c then the time taken in figure 1 is lesser than the time taken in figure 2. Let's understand this with an example, for an easier equation let the speed of light be 3 m/sec, AB = 6m, XZ = 12m. 

Now, lets solve it, We know that Speed = distance / time

In figure 1,

3 m/sec = 6m/time 1 

So by solving the equation we get,

time 1 = 2 second 

 

In figure 2,

3m/sec = 12 m/time 2

So by solving the equation we get, 

Time 2 = 4 second

 From this, we conclude that time in the spaceship was 2 seconds less than the observer outside the vehicle i.e the time in the spaceship was a bit slower than the time outside the spaceship. 

Not we can just verify this phenomenon but we can measure it too from the formula,

For today it is over, meet you next time. But, today concludes that TIME TRAVEL IS POSSIBLE.

 

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HAIL MOTHERLAND