How many dimensions are there?

Question

i know of 4: length, width, depth, and time. are there any more?
if so, are they impossible to visualize?

Answer 1

In our universe, there are no other dimensions that we can see. According to string theory, dimensions can reach up to the 16th at least, but these dimensions in our universe occur on such a small level we can't see their effects even under the most powerful microscope.
While our dimensions can extend in a straight line, these dimensions all curve so quickly into themselves that they aren't noticed.

Answer 2

That is a very complex question that will vary depending on the physicist you speak too. We can observe the four you mentioned, but time only became thought of as a dimension in the first half of the 20th centuary with Einstein. String theory opens up oportunity for a lot more dimensions, however string theory is exactly that, a theory and hotly debated/researched in the physics community.

One reason people theorize these other dimensions is for the united field theory, which basically is a set of formulas which describe all the field forces in the universe (gravitational, electromagnetic, strong nuclear, weak nuclear), the 'holy grail' of theoretical physicists of today.

Answer 3

For all intents and purposes, there are three spatial dimensions. The algebra associated with relativity makes it useful to think of time as a fourth geometrical dimension, but there is no physical meaning to time being the "fourth dimension."

As for string theory, it may prove the there are as many as 10 spacial dimensions, in addition to time, but it also says how the additional 7 are negligible in the macroscopic world.

Answer 4

According to string theories there are 10 or 11 dimensions which are called curved . I can not imagine them

Answer 5

actully that guy is wrong combined string theory with super gravity get you to the 11th dimension not 16th