Actually, that is a very common misconception. Albert Einstein did **not** win the Nobel Prize for his theories of relativity (neither Special nor General).

He was awarded the 1921 Nobel Prize in Physics specifically **"for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect."**

Here is why he didn't win for relativity at the time:

1.  **Selection Committee Conservatism:** The Nobel Committee at the time tended to favor experimental physics and concrete "discoveries" rather than purely theoretical frameworks. Relativity was seen by some members as too philosophical or mathematically abstract.
2.  **Lack of Proof:** Although the 1919 solar eclipse expedition provided evidence for General Relativity, there was still significant scientific debate and skepticism regarding the theory's absolute proof in the early 1920s.
3.  **Political Tension:** There was a rise in nationalist and anti-Semitic sentiment in Germany (the "Anti-Einstein League"), which pressured the committee to avoid honoring his most famous work.

By 1921, Einstein had become such a global superstar that the Nobel Committee felt they *had* to give him the prize, but they were still hesitant about relativity. They used the **photoelectric effect** (which explains how light ejects electrons from a material) as a "safe" compromise because it was a discovered law that had been experimentally verified.

**Fun fact:** When Einstein gave his official Nobel lecture, he bucked tradition by barely mentioning the photoelectric effect and instead spent almost the entire speech discussing Relativity.
