Einstein's theory of alternate dimensions referred to his hypothesis that time and space could be expanded or compressed. This hypothesis was called "space-time expansion" or "space-time contraction". According to Einstein's theory of alternate dimensions, time and space were not independent entities but could be combined into a larger concept of space. This kind of space was called a " Dimensional Space ". It was created by stretching or compressing time and space. Einstein's theory of different dimensions was very important in physics because it proposed a new explanation that could help people better understand the nature of the universe. It also caused widespread discussion and research among scientists. Although Einstein's theory of different dimensions had not been proved by experiments, it still had an important position in physics and had a profound impact on scientists exploring the mysteries of the universe.