Can somebody please explain the string theory?

Question

if you could can u explain it in detail or if it would take to long you can just answer it in laments terms

Answer 1

String theory explained in detail will not be found on Y! Answers I am afraid. Physics is a needy mistress, and if you want to know it in details you have a large amount of heavy reading in front of you. I will attempt, however, to give you a tiny peek into their sick little world.

String theory is an attempt at a "Theory of Everything". That is, if it works out, string theory is supposed to tell you everything you need to know about the nature of matter, time, the universe, and everything. So far...it hasn't. Those sympathetic to the theory will tell you that is because we do not yet have instruments which can measure the strings.

It is called "string theory" because it supposes that all matter in the universe is made up of "One-dimensional extended objects" (basically a line, or string), as opposed to the quantum theories which say everything is made up of "Zero-deimensional point particles". So matter is made up of lines, or strings, instead of points or dots. That's where the name comes from.

Physics recognizes four "natural forces": electromagnetic, strong and weak nuclear, and gravity. String theory proposes to explain all four of them with reference only to attraction at the level of the strings, which is called "Quantum Gravity".

String theory has 5 popular sub-divisions, which many are trying to bring together under what is called M-Theory. In M-Theory there are between 10 and 11 space/time dimensions. Explain that in one post!

In this theory, the strings (which are all the same) "vibrate" at different "resonant frequencies", and this is where the different subatomic particles come from. Strings that vibrate on "E" become an electron, and strings that vibrate on "P" become a proton etc. However each string is capable of vibrating at every frequency, and strings can and do constantly move from particle to particle, and this they say is where the forces come from, string movement across particles.

There is just far too much involved to get into in one post, but hopefully I have summed up some of the main tenets (very simplistically) and given you a little better idea of where they are coming from. If you want to get deeper into this you would have to learn more about string theory on your own and then ask a more specific question each time, so it gets more attention.

Answer 2

string theory is the latest hope for the grand unification of gravity and quantum physics and if proven would possibly bring all of einsteins work together. it holds that every molecule in your body and everywhere is like a tiny vibrating string which creates different frequencies which can make it appear in different ways that fit with all theories of physics simultaneausly..

to robert p

a lot of people can explain these concepts and all they are unable to do is prove them.

even if they did prove them how does that disprove a GOD?

I should think it would make GOD all the more real when we know the full power that he exerted in our creation. the ideas of creation as a concept are not at odds with the evolutionary and big bang theories.

At the most they conflict with the details of the creation story that was known to exist from ancient mesopatamia and was altered and subsequently included in the bible. it is lore handed down verbally for hundreds of generations.

faith helps bridge gaps in knowledge. It is not meant to obscure facts in evidence. we know that terestrial processes take x amount of time. working backwards from that alone we know the earth is older than the biblical scholars say. just the formation of diamonds and their surfacing takes on the order of millions of years.

that is a fact not a theory. evolution happens that is a fact not a theory. the particulars may conform to darwins ideas or a new theory could be proposed that fits better but it does happen either way. we see it daily

Answer 3

11 dimensional string theory, (and 26 dimensional M theory), has not produced anything.

It is possible that the extra 7 dimensions of space in string theory, (that are not perceived), are mathematical deception that first appeared with 5 dimensional Kaluza-Klein Theory.

String theory is possibly deception derived from adding dimensions of space to the already existing 3 dimensions of space one dimension at a time at 90 degree angles to the previous dimension.

That string theory is possibly invalid is stated at the end of the wikipedia article on string theory.

Answer 4

No i cant .I cant explain the big bang theory. or the steady state theory or the singularity theory and so . Science keeps coming up with all these ridiculous theories to explain how the universe began.They won't accept a Creator as even a possibility for the creation of the universe because there is no proof God exists.They can't prove any of their theories but are happy to accept them for the time being until they find their answers.

Answer 5

ok, I'm not really any better qualified than the man in the street, here's as much as I know. Essentially, quantum mechanics is the theory used to explain the physics of small things - atoms and what makes them up. It tells us a lot about what we can't hope to know or measure. So the uncertainty principle tells us that knowledge of a particles position limits how much we can know about it velocity. It postulates that everything - energy, light, matter - comes in small indivisible packets, known as quanta (hence the name.) It came into being in the early 1900 via people like Planck, Heisenburg and Bohr to explain some oddities in experimental observations of the behaviour of matter.

Relavitivity on the other hand deals with fast and/or larger objects. For one thing, it's the best explanation we have of gravity (the General Theory of Relativity). This was Einstein's brainchild of the same vintage as quantum mechanics and derived from oddities in astronomical observations (although to be honest, Einstein's genius was that his theory predicted a lot of the anomalies before they were found). For a number of reasons, the two theories don't sit well together. Relativity puts an upper limit on the speed at which information can be sent (the speed of light); quantum theory, through something called quantum entanglement, seems to permit one particle to instantaneously change the state of a distant particle. So one appears to contradict the other (the experimentalist in me forces me to note that there is no conclusive experimental evidence of a contradiction yet, but folk are working on it). In one sense, I guess its not all together surprising that the two don't agree. Einstein was never a big fan of quantum mechanics, famously being quoted as saying that god doesn't play dice.

Quantum mechanics has been very successful at explaining the physics of atoms and the like; Relativity has been equally successful with galaxies and black holes. We live our lives somewhere in between and so we rarely encounter either in any real sense. We can explain most everyday things using physics from pre 1900: Newton and that great Scot Maxwell. (There are some exceptions: the laser in your CD player for example really needs a bit of quantum mechanics to work.)

Perhaps the great theoretical challenge of the last 50-100 years has been to unify all the theories physicists have to explain various things. So for example, Feynmann and others managed to unify quantum mechanics with what we know about electro-magnetic radiation (light, radio, TV, x-rays) in the middle of last century. However, the big problem has been to make quantum mechanics compatible with the existence of gravity (and so with relativity). I'm not up on what the difficulties are, but for one thing the relative sizes of the forces involved are very different. Gravity, on the scale of an atom is a tiny force compared to the other things that effect it. That makes it technically quite difficult to use the same set of mathematical tools on both; the mechanics of any theory will be difficult. Anyway, String theory is one of the ways in which theoreticians have tried (and some of them would say succeeded) in unifying quantum mechanics and relativity. It is still quite controversial. By no means all theoreticians think it is a good explanation. For a while recently it seemed to go out of fashion a wee bit, having been the big thing for a while. However, it seems to be making something of a come back. How it works is dtill beyond me. i hope that made some sense.

Answer 6

It states that the universe and everything is made of fine strings, so fine that not even the microscope can see.
Im sorry, but i can't go into details. I can't find the book on string theory, it's somewhere in my library.

Answer 7

intrinsically a piece of string has length but that length is unknown because it can be any length. the phrase how long is a piece of string means that the quantitative answer is not known and there is an implicate understanding that the answer will be difficult to find given the information available.

Answer 8

The short version it that mathematically speaking, matter behaves as though it were composed of short stiff strings. Think guitar string, not kite string.

Answer 9

string??? u put it straight, it become straight....u put it in a circle form, it become circle...so the string has no theory, it needs a forces to push then it will move...just like a puppet.....
but in another point of view...it is consider flexible in lives....and it probably looks nothing and simple..but in daily lives, we need it all the time......by the way, this took me less than 5 mins to answer......