albert einstein

Indeed, Albert Einstein was a theoretical physicist and one of the most influential scientists of the 20th century. He is best known for developing the theory of relativity, which includes both the special theory (1905) and the general theory (1915). His work revolutionised our understanding of space, time, and gravity. Einstein also contributed to the development of quantum mechanics and was awarded the Nobel Prize in Physics in 1921 for his explanation of the photoelectric effect.