Question

what is 4th dimension?​

Answer 1

Answer:

Explanation:

A four-dimensional space is a mathematical extension of the concept of three-dimensional or 3D space. Three-dimensional space is the simplest possible abstraction of the observation that one only needs three numbers, called dimensions, to describe the sizes or locations of objects in the everyday world.

Answer 2

Answer:

Many physicists, including Einstein as part of his 'Special Theory of Relativity', proposed that the fourth dimension is time. He said time should be a dimension like the other spatial dimensions because space and time are inseparable. ... Time's dimension is a line going from the past to present to future.

Explanation:

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