All 11 Dimensions Explained. This video explains All 11 Dimensions in detail. It covers all the dimensions, starting from the 0th dimension to the 11th dimension. Here, you will also get answers to some important questions like, what we mean by dimensions, why do physicists and mathematicians study extra dimensions, how many dimensions are there in the universe and if there are so many dimensions in existence then why we are not able to perceive them.

What we actually mean by dimensions?
A dimension is the number of coordinates required to specify the position of an object in space.

Why do physicists and mathematicians study extra dimensions?
One reason is that it can help to explain phenomena that cannot be explained with just three dimensions. Another reason to study extra dimensions is that the idea of extra dimensions can help to unify different theories of physics.

How many dimensions are there in the universe?
According to classical physics there are 3 dimensions of space; length, breadth and depth and one dimension is of time.
The general theory of relativity combines these four dimensions into a single dimension known space-time dimension
But the string theory - 10 dimensions and
M theory - 11 dimensions
Bosonic string theory - Space-time is 26 dimensional

Why we cannot feel the presence of higher dimensions?
According to some researches extra dimensions may be "curled up" at extremely small scales. There is a process known as compactification, where higher dimensions are curled in on themselves.

Zero Dimensional World (0D)
It represents a point or a location in space that has no length, width, or depth.

One Dimensional World (1D)
In a one-dimensional world, everything exists on a single line therefore there is no width or depth.

Two Dimensional World (2D)
In the two dimensional world, objects only have length and width. As there is no depth, everything is flat and exists on a plane surface.

Three Dimensional World (3D)
On adding one more dimension to 2 dimensional objects we enter into the world of three dimensions. This third dimension is of depth. On adding the 3rd dimension of depth the flat objects turn into the solid three dimensional objects having non-zero volumes.

Five Dimensional World (5D)
Actually Parallel universes exist in this dimension, therefore in the fifth dimension you can have careers in different fields. In this case, you will have another versions of yourself in parallel universes that would be living their lives independently.
But one limitation of fifth dimension is that you cannot meet your self-version directly using shortcuts to another timeline of parallel universe.

Six Dimensional World (6D)
6th dimensional space is comprised of all possible three-dimensional realities that could exist. Essentially, it is a space that contains all possible variations of our world. In the 6th dimension, time is not linear but rather a collection of all possible moments that exist simultaneously. This means that every event that has ever occurred, or will ever occur, exists in the same space in the 6th dimension.

Seven Dimensional World (7D)
According to some theories, the seventh dimension is a space-time continuum that connects all possible universes and timelines. It is a realm of pure possibility, where everything that can exist does exist. In other words, the seventh dimension is a place where all possible universes and timelines converge.
The 7th dimensional universes may have originated from different start conditions

Eight Dimensional World (8D)
An 8th dimensional object can be thought of as a series of seven-dimensional "surfaces" or shapes. The eighth dimension has a plane of all the possible presents, pasts and futures for all the infinite number of parallel universes and all these infinite universes extend up to infinity.

Nine Dimensional World (9D)
In the 9th dimension, every possible timeline, every possible reality, and every possible universe exists simultaneously. Infinite number of universes exist in the ninth dimension. It is possible for the universes in the ninth dimension to have their own laws of Physics and separate conditions and probabilities of their origin.

Ten Dimensional World (10D)
The 10th dimension is also believed to be a place where all possible versions of the universe exist simultaneously. This is known as the "multiverse" theory, and it suggests that our universe is just one of an infinite number of universes that exist in different dimensions. Each of these universes may have different physical laws, constants, and dimensions.

Eleven Dimensional World (11D)
In the 1970s, string theory emerged as a possible solution to the problem of unifying the forces of nature. 11th dimension is a fundamental component of string theory. String theory requires the existence of 11 dimensions: ten of space and one of time.
In the 1990s, a new theory called M-theory emerged, which proposed the existence of the 11th dimension.