The understanding of the theory of relativity, particularly Albert Einstein's special and general relativity, typically requires a solid foundation in advanced mathematics and physics. As such, the theory of relativity is usually taught at the university level in physics or related disciplines.
The age at which individuals are ready to grasp the theory of relativity can vary significantly. Some people may start studying advanced physics and mathematics in high school or even earlier if they have a strong aptitude and interest in these subjects. Others may not encounter relativity until they pursue higher education in physics or a related field.
It's important to note that the theory of relativity involves complex mathematical concepts and abstract thinking. It often requires a solid understanding of calculus, linear algebra, and other mathematical tools. Additionally, a thorough comprehension of classical physics and electromagnetism is typically necessary before delving into relativity.
While there is no fixed age at which someone can understand the theory of relativity, it generally requires a strong foundation in mathematics and physics, which are typically acquired through advanced education and study.