Home » Interesting Questions » Travelling back in time by increasing speed?

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 3,066 other subscribers

Archives

Travelling back in time by increasing speed?

Share with:


Is it true statement that travelling faster than speed of light and travelling back in time both are same thing.how ?

Asked  Chandan Kumar

 

 

Answer

Though travelling back in time is implied based on the formulas of theory of relativity, physically going back to past is not yet achieved.

The following posts may enthuse you.

http://www.wikihow.com/Go-Back-in-Time

https://spaceplace.nasa.gov/review/dr-marc-space/time-travel.html

https://www.livescience.com/1339-travel-time-scientists.html

However, as famous Theoretical physicist and string theorist Brian Greene, of Columbia University, said: “You can build a spaceship, go out into space [and travel] near the speed of light, turn around and come back. 

“Imagine you go out for six months and you turn around and you come back for six months.”

While you are travelling at the speed of light, time stays slow relative to the people who are standing still back on Earth.

As a result, you would be going fast while your clock would still be going slow.

Prof Greene: “When you step out of your ship, you’re one year older but Earth has gone through many, many years. 

“It can have gone through 10,000, 100,000 or a million years depending on how close to the speed of light you traveled.”

However, the only problem is that a machine travelling at such speed would require an “unimaginable” amount of energy, while the stress from the centrifugal force on the body would likely prove fatal

Greene says: “No one has given a definitive proof that you can’t travel to the past.

“But every time we look at the proposals and detail it seems kind of clear that they’re right at the edge of the known laws of physics. 

“And most of us feel that when physics progresses to a point that we understand things even better, these proposals just will be ruled out, they won’t work.”

Ask a Doubt

Post your Physics Doubts here

Name (required)

Email (required)

Subject

Message/Doubt/Question

Upload a file if required

askphysics@Twitter

Half Yearly Exam Count Down

Half Yearly Exam Count Down KVS Ernakulam RegionOctober 17th, 2017
The Half Yearly Examination for Kendriya Vidyalayas of Kerala starts from 17 October 2017
%d bloggers like this: