Question

define at least seven paradox related to time travel.explain in very easy language.

Answer 1

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ok:-

grandfather paradox:-

I am going to explain this to you in very very easy language:-

This paradox asks what happens if you were to travel back in time and killed your grandfather.

Your grandfather would be dead, meaning you would never have been born, which means you could not have been alive to go back in time and kill your grandfather, but that means your grandfather would be alive and you would be born and so on with seemingly no answer.

Since, as far as we know, time travel of this kind is not possible, the paradox is not one we will face in practice.
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An example of a bootstrap paradox involving information would be if a time traveler went back in time and taught Einstein the theory of relativity, before returning to his own time. Einstein claims it’s his own work, and over the following decades the theory is published countless times until a copy of it eventually ends up in the hands of the original time traveler who then takes it back to Einstein, begging the question “where did the theory originate”. We cannot say that it came from the time traveler as he learned it from Einstein, but we also cannot say that it is from Einstein, since he was taught it by the time traveler. Who, then, discovered the theory of relativity?

OR let us take another example:-
In brief, the Doctor proposes a brain teaser. Imagine you have a time traveller who loves Beethoven and decides to travel back and meet his hero. However on arriving, he discovers Beethoven has not and will not write any of the music the time traveller loves so much. The time traveller, desperate, decides to copy out all of his favourite tunes for Beethoven. The plan is successful. Several centuries later, a certain time traveller is listening to his favourite composer, Beethoven, and decides to go meet the man himself… 
The question is: who really wrote Beethoven’s Fifth Symphony?

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The Bootstrap Paradox is a paradox that enables things to exist without being created. This is one of the more popular time travel paradoxes.

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