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Einstein scientific achievement is---
Discovery of photoelectric effect and X - RAYS
Discovery of Radio activity and theory of Relativity
Explanation of theory of relativity and photoelectric effect on the basis of quantum theory
none of the above
Einstein scientific achievement is explanation of theory of relativity and photoelectric effect on the basis of quantum theory. Albert Einstein, in his theory of special relativity, determined that the laws of physics are the same for all non-accelerating observers, and he showed that the speed of light within a vacuum is the same no matter the speed at which an observer travels.
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