Question

Is time the 4th dimension or it dosen't really matter? Time has direction as well as magnitude so what unit vector should be used for time? Does antimatter really exist in the cosmos? and is time a multiple of the 3rd dimension

Answer 1

Idk anything about the 4th dimension, but yes antimatter does exist, and there have been theories for time in more than one dimension, but it requires advanced physics to really understand, you could probably learn a lot about time if you read up on special relativity.

Answer 2

If it (anti matter) exists theory of relativity would be incorrect if we travel through a black hole. relativity states that any body can't move faster than the speed of light. Then it must be possible to travel backwards in time. I heard that the higg's boson particle (God Particle) travels faster than the speed of light So is theory of relativity incorrect , then the whole physics might change.

Answer 3

maby using comlex number :)

Answer 4

Represent time? @ikram002p

Answer 5

i ment complex number , yeah time in space and stuff

Answer 6

You can never travel back in time

Answer 7

You can't but you can see back in time

Answer 8

Correct!

Answer 9

you can represent time with a third variable. If you look at the graph of Lorrentz transformations, thats one example of how they do it

Answer 10

Is there a method like calculus which we use for slopes for time

Answer 11

on top of that, the higgs boson is a quantum mechanics idea that unifies the source of fermions and bosons. This does not disprove relativity it itself. The report that the boson was moving fast than light was found to be a result of ERROR, and is not to be taken as true. Whether or not it CAN move faster than light, uh.....thats a bit more tricky. I personally don't believe it (And a lot of scientists agree lol, its not JUST my opinion) but you never know....

Answer 12

http://en.wikipedia.org/wiki/Minkowski_diagram
Here is what they are called. A graphical representation of Lorentz Transformations :P I forgot what their name was.

Answer 13

A method like calculus? What do you mean by slopes for time?

Answer 14

there can't be slopes

Answer 15

Yeah they can be

Answer 16

so we use calculus only

Answer 17

probably

Answer 18

...are you still asking question lol. anyways, in my basics quantum mechanics course, we usually had a set velocity when learning lorentz transformations, which made things a LOT easier, however I'd assume that if you wanted to REALLY model anything with respect to time, you'd need multivariable calculus. We also used a lot of linear algebra when learning quantum mechanics (eigenvalues, eigenstates) so you'd probably need vector calculus as well.

Answer 19

well thank you dude I just watched a cosmos show on national geographic and got endless list of questions

Answer 20

ahah no problem, Modern Physics is really interesting stuff. Can be a little hard to wrap your mind around it alone though, so I'd highly recommend taking a course in it (as long as the teacher/prof is good).

Answer 21

yes

Answer 22

Technically we live in a 4 dimensional world called minkowski space which does have a time component as one of its dimensions and time unit vectors do not really come up as useful constructs in physics, or at least the physics ive encountered so far. i cant account for string theory or things like that.

Answer 23

now the difference between describing space in 4 dimensional space-time and just 3 dimensional parametric equations that are functions of time, is that the space-time analog is useful when you are dealing with relativist effects
otherwise our normal 3 dimensional reference frame works just fine

Answer 24

antimatter does exist we have been able to create it in laboratories however we have not (as far as we know) detected any large formations of antimatter out there in the cosmos
our observable universe appears to be dominated by ordinary matter and we do not know why

Answer 25

this physicist named richard feynman created the theory of quantum electrodynamics
this theory explains quantum effects of maxwells electromagnetism
and in this theory we draw what are called feynman diagrams which usually look something like this...

Answer 26

luckily I was just learning about this stuff in class this semester

Answer 27

i think the more important discovery is actually the recent one that proves cosmic inflation existed in the very early universe

Answer 28

cosmic inflation was basically a very rapid and exponential growth at the birth of our universe that lasted for a little bit and then slowed down for some reason
if the discovery holds then it means we have no choice but to reconcile quantum mechanics and gravity

Answer 29

which would ultimately lead to a grand unified theory

Answer 30

Right, time is not the 4th dimension imo. First, Space-Time is the fourth dimension.Second, yes anti-matter is said to exist when there are anti-particles which have opposite charges, spins and masses to their opposite counterparts such as electrons and positrons. lastly, time being a multiple of the third dimension ? there're three natural dimensions length, mass and time so time being a multiple of itself doesn't seem appropriate does it ?

Answer 31

this is called a feynman diagram and the arrows represent subatomic particles
a straight arrow represents a particle with mass where a squiggly arrow represents a photon and where two arrows meet is where an interaction occurs