- #1
Haorong Wu
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- Are time and space continuous or discrete?
In another forum, some people argue that time and space are discrete, due to Planck time and Planck length.
However, I disagree with this idea. I think, the Planck time and Planck length are just some scales that we can measure, but they do not forbid continuous time and space shorter than them. Besides, I hardly remember any equations in quantum mechanics forbid any continuous values of time or space. Furthermore, I read a idea that if space is discrete, then the continuous symmetries of space would not exist, such as spatial translations.
So I hold the idea that time and space are continuous.
However, I disagree with this idea. I think, the Planck time and Planck length are just some scales that we can measure, but they do not forbid continuous time and space shorter than them. Besides, I hardly remember any equations in quantum mechanics forbid any continuous values of time or space. Furthermore, I read a idea that if space is discrete, then the continuous symmetries of space would not exist, such as spatial translations.
So I hold the idea that time and space are continuous.