పరహితము గొప్పదనాన్ని గురించి తెలుపుతూ మిత్రునికి లేఖ రాయండి.
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Albert Einstein is best known for his equation E = mc2, which states that energy and mass (matter) are the same thing, just in different forms. He is also known for his discovery of the photoelectric effect, for which he won the Nobel Prize for Physics in 1921
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