4th Dimension

A four dimensional space ( 4D ) commonly known as space - time to the scientists is a mathematical extension of the concept of three - dimension or 3D - space . To understand 4D we need to first understand dimensions . So, dimension is a measurable extent of a particular kind or in simple terms dimensions are direction . Firstly, there is zero dimension which is just a point in the universe . It has no length; breadth or height it is just an infinitely small point . The above picture shows 0 th dimension .   Then 1 st dimension, it ’ s a line with just length and no breadth . If you connect 2 zero dimension the you get the first dimension or 1D and if we were to live in the 1D world, we could only see in zeroth dimension or we could only see points . The above picture shows 1 st dimension .   Similarly, 2D or 2 nd dimension or square is created by combining 2 1D lines . If we are in second dimension we can see the world in first or zero dimension we can jus...