The topic of science no.1

Hello everyone. Today I will start a topic about science. Every week from now there will be a new one. I will try to give answers to everyones questions about the topic. Every week there will be a new topic. Today the topic is about Albert Einstein and the Relativity theory.

This is a pretty hard topic because the relativity theory says things that is hard for us to belive and understand.

There is 2 versions of the theory, the special relativitytheory and the generalrelativitytheory.

The special one was the first one that Einstein released in the year 1905, it said that mass and energy is equal E=mc^2
That time is not absolute, meaning that my time doesnt need to go with the same speed as yours.
That nothing can cross the speed of ligt barrier.
That objects that is moving has a differnt mass and lenghts then a object that is not moving.

The general relativity theory was relesead in 1915 and was the complete theory that included gravity.
The general theory explains and give us answers about the universe.
It says that gravity and acceleration is the same thing. That a apple is not falling because of a force (Newton). That space is not flat, that gravity bends time and room.
That universe cant be static.

Almost 90 years after the theory was first announced nobody has been able to prove Einstein wrong. The theory is still going strong.

Please give me your thoughts and questions on this and I will try to give some good answers.

well i am esteemed to be the first to reply to the first of the set of science questions in which i will be taking part.


i dont understand how space-time can be bent. it just dosent make sence for me.  


and another thing. how can goku travel instantaneously if noone can fo over the speed of light?

"how space-time can be bent? "

Because of gravity, without gravity space-time would be flat, what gravity actually does is to bend the space-time. Gravity is non-flat space-time.

The second question must you say in another form because I dont understand the question.

the second question was a joke.

and what the hell is space-time? you didnt make it easy to understand when you awnsered me. but to make it simpler, what is space-time?

Originally posted by Falcon4
the second question was a joke.

and what the hell is space-time? you didnt make it easy to understand when you awnsered me. but to make it simpler, what is space-time?

Einstein made the revolutionary suggestion that gravity is not a force like other forces. but is a consequense of the fact that space-time is not flat as had been previosly assumed- it is curved or "wrapped" by the distribution of mass and energy in it. Bodies like earth are not made to move on curved orbits by a force called gravity. instead they are follwing the nearest thing to a straight path in a curved space, which is called a geodesic.
A geodesic is the shortest (or longest) path betwen 2 nearby points.

all this  is happening in the space-time = The four-dimensional space. (3 room+1 time)
space time is a fictionname for room+time

ah ok, so space time is the 4dimensional universe.

 and so how is it able to be bent? by being bent, can it become shorter to get to other solar systems from earth?

Light is the fastest clockable thing/phenomena that we know of,
Einstein says it is the fastest and we can\'t go faster, i think that might not be true, if a black hole is strong enough to attract all light so that none escapes from its gravity, i think there might be another force that is faster then light.

Now it is getting really interesting.
General relativity theory allowes what we call bridges but that is now known as wormholes. Einstein and Nathan Rosen did some work on this ."Einsten-Rosen Bridges."
The E-R bridges doesnt last long enough for a space ship to get through.
However it has been suggested that it might be possible for an advanced civilization to keep a wormhole open.
To do this or to warp space-time in any other way so as permit timetravels. It can be proven that one needs a region of spacetime with negative curvate like the surface of a saddle. Ordinary matter which has a positive energy density give spacetime a positive curvate like the surface ofa spehere.
This means in order to warp spacetime in a way that will allow travel into the past (thats what you are saying:)) is matter with negative energy density.

BTW: An einstein-Rosen bridge is a wormhole connecting two distant regions.

Originally posted by Toxical
Light is the fastest clockable thing/phenomena that we know of,
Einstein says it is the fastest and we can\'t go faster, i think that might not be true, if a black hole is strong enough to attract all light so that none escapes from its gravity, i think there might be another force that is faster then light.

Einstein doesnt say that light is the fastest thing. What he says is that nothing can break through the light-barrier. this means that matter that is traveling faster than light can never go under the speed of light and virce verca.

And about the black hole, there are some really interesting theories on black holes

yes there are. one of them is that a black hole also has a white hole ont he other side of it tand that black holes could be actual wormholes.


all i wanna know is i wanna go through one of them. see what its like yo know what i mean? inless i get killed before i go through it...

Originally posted by Falcon4
yes there are. one of them is that a black hole also has a white hole ont he other side of it tand that black holes could be actual wormholes.


all i wanna know is i wanna go through one of them. see what its like yo know what i mean? inless i get killed before i go through it...

U cant go through a black hole. Its impossible, the timedilation makes it impossible.

Well im no expert but isn\'t the whole time dialation thing just a hypothesis. We are never gonna know untill we actually have experience with black holes.

I think Einstein said that if you travel as fast as light,
and go to our nearest neighboring start 4 light years away or so,
time for you will stand still while time for the people you left behind will go on ....??? That does not make any sense to me, unless he meant something else...
if you travel as fast as light for 10 light years ... only ten years pass for people on earth, so how much time passes for the passenger on that spaceship?   If they go as fast as light.

This is weird, it seems time will slow for people on the spaceship, while the time on earth will continue without change.

Originally posted by Bossieman


U cant go through a black hole. Its impossible, the timedilation makes it impossible.

ANYTHING IS POSSIBLE.



have you heard of the theroy of the "white hole?\' where the stuff ets spit out in a white hole?

I think Einstein said that if you travel as fast as light,
and go to our nearest neighboring start 4 light years away or so,
time for you will stand still while time for the people you left behind will go on ....??? That does not make any sense to me, unless he meant something else...
if you travel as fast as light for 10 light years ... only ten years pass for people on earth, so how much time passes for the passenger on that spaceship?  If they go as fast as light.

This is weird, it seems time will slow for people on the spaceship, while the time on earth will continue without change.

Whatever, this stuff is nothing more than mere speculation.