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open_problems [2018/04/08 17:36] georgefarr |
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Real problems are things related to **unexplained observed phenomena**, like dark matter or dark energy. | Real problems are things related to **unexplained observed phenomena**, like dark matter or dark energy. | ||
- | In addition, there are things that we can describe but do not understand. These are not really problems but rather **puzzles**. Examples are the [[open_problems:flavour_puzzle|still not understood masses and mixing angles]] of the elementary particles or also the [[open_problems:hierarchy_puzzle|hierarchy puzzle]] and the question why strong interactions [[open_problems:strong_cp_puzzle|do not violate]] [[advanced_notions:cp_symmetry|CP symmetry]]. | + | In addition, there are things that we can describe but do not understand. These are not really problems but rather **[[http://jakobschwichtenberg.com/problems-vs-puzzles/|puzzles]]**. Examples are the [[open_problems:flavour_puzzle|still not understood masses and mixing angles]] of the elementary particles or also the [[open_problems:hierarchy_puzzle|hierarchy puzzle]] and the question why strong interactions [[open_problems:strong_cp_puzzle|do not violate]] [[advanced_notions:cp_symmetry|CP symmetry]]. |
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- | **The Biggest Problems** | + | **The 5 Great Problems** |
- __The problem of quantum gravity.__ This is the problem of combining general relativity and quantum theory into one theory. Such a theory would be able to describe all known interactions of nature. | - __The problem of quantum gravity.__ This is the problem of combining general relativity and quantum theory into one theory. Such a theory would be able to describe all known interactions of nature. | ||
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+ | * [[https://arxiv.org/abs/1804.08730|Life, the universe, and everything - 42 fundamental questions]] by Roland E. Allen, Suzy Lidström | ||
* http://math.ucr.edu/home/baez/physics/General/open_questions.html | * http://math.ucr.edu/home/baez/physics/General/open_questions.html | ||
* https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_physics | * https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_physics |