- #1

Haorong Wu

- 413

- 89

- TL;DR Summary
- 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.