Time travel through black holes

Lets briefly focus on Einsteins theory of relativity (time dilation with gravity )-

Einsteins theory states that time is slowed when gravity increases.
I know this sounds wierd and confusing but lets understand it gradually.
Lets understand why time slows with Gravity.
You just need to remember that the universe has 4 dimensions. The 3D space and the 4th dimension is time!

Now consider the Earth. Imagine two points at the ends of its Diameter! The light will have to travel a distance around the circumference of Earth to reach from point A to Point B.
Now suppose the Earth was absent! Then the light would travel in a straigth line from A to B. This means that the presence of Gravity has caused a distraction in the 4 dimensions i.e; it is bending the space-time(or the 4 dimensions). Since the space is getting bent due to gravity(i.e; The path from point A to point B is bent due to presence of Earth) The fourth dimension time( which is definitely not an independent dimension according to theory of relativity) is also being elongated or slowed. Hence  time slows near gravity.

Please read this again if you dont understand…

Close to bodies such as Sun or Earth which have relatively smaller mass ,such effects (time dilation effects) are generally too small to be noticed and can be ignored!

However when we speak about black holes that are of billions times mass of sun.. time dilation effect cannot be ignored!

Black holes have an event horizon. We know nothing can escape black holes.
However since black holes dont have a defined surface-we define its event horizon(similar to surace of balck hole).
It is the region surrounding black hole in which once an object just enters- then- its escape is impossble! ( you can call it as the critical region!)

Black holes have accelration  due to gravity that shows different variation than planets! Like we know-for the Earth-how it varies with depth and altitude -this is because earth has a surface.
However black holes dont have a surface. They are like high mass filled in a point!!! Hence we cant define its surface but we define its area of influence and event horizon of black hole is that region where its influence just begins!

For supermassive blackholes once you are on the event horizon of black hole there is a possibility you will escape because the acceleration due to gravity shows exponential behaviour with distance from black hole.. and a mere escape is possible which is not possible incase of small black holes.

So imagine you standing in free space at a safe distance from blackhole!
your friend on the other hand is with you.
Now he starts moving towards the black hole.

And reaches close to its event horizon!
As soon as he reaches the event horizon. Time has slowed tremendously for him.
The time dilation is too strong near black hole.
Suppose he spends few seconds in the event horizon of black hole before escaping it (escape is difficult ). We know time for him is slow there .

that is if for his friend it shows 1 hr have passed the guys(at the event horizon ) clock show’s that less than 1 hr has passed(due to high mass of black hole the clock is ticking very slow and 1hr for his friend may correspond to even 1 second for guy at the event horizon ). That is after few seconds the guy at the black hole may become younger than he would have if he was with his friend far from it.
the guy has relativisticly travelled in past by getting younger !!

You may think then why astronauts on space stations are not affected this as they spend 1 year around Earth.
they are indeed affected!

The effect is hardly noticable…

As the earth has small mass!

17 thoughts on “Time travel through black holes

  1. Hi there, i read your blog occasionally and i own a similar one and i was just curious if you get a
    lot of spam responses? If so how do you protect against it, any plugin or anything you can recommend?
    I get so much lately it’s driving me mad so any assistance is
    very much appreciated.

  2. I just like the helpful info you provide in your articles. I’ll bookmark your blog and take
    a look at again here regularly. I’m moderately certain I’ll be informed lots of new stuff right here!
    Best of luck for the next!

  3. You really make it seem so easy along with your presentation however I to find this topic to be actually one thing which I believe I’d never understand.
    It sort of feels too complicated and extremely wide for me.
    I am looking ahead for your next put up, I’ll attempt to
    get the hang of it!

  4. Greetings from Ohio! I’m bored at work so I decided to check out your website on my iphone during lunch break.

    I enjoy the information you present here and can’t wait to take a
    look when I get home. I’m surprised at how fast your blog loaded on my cell phone ..

    I’m not even using WIFI, just 3G .. Anyhow, amazing site!

  5. I really like what you guys are up too. This type of clever work and coverage!
    Keep up the good works guys I’ve included you guys to our blogroll.

  6. Hello there! I could have sworn I’ve visited this site before
    but after going through many of the articles I realized it’s
    new to me. Anyhow, I’m certainly happy I came across it
    and I’ll be book-marking it and checking back often!

  7. Do you have a spam issue on this blog; I also am a blogger, and I was wanting to know your situation;
    many of us have developed some nice procedures and we are looking to exchange solutions with other
    folks, why not shoot me an email if interested.

  8. Wow, awesome blog layout! How long have you been running a blog for?
    you made blogging glance easy. The whole look of your website is excellent, as neatly as the content!

  9. Hey there would you mind sharing which blog platform you’re working with?
    I’m planning to start my own blog in the near future but I’m having a tough time choosing between BlogEngine/Wordpress/B2evolution and Drupal.
    The reason I ask is because your layout seems different then most blogs and I’m looking for something unique.
    P.S My apologies for being off-topic but I had to ask!

Leave a Reply

Your email address will not be published. Required fields are marked *