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Physicists have measured time dilation on the smallest scale ever using an atomic clock made of thousands of ultracold atoms formed into a stack of pancake-shaped blobs Physics 16 February 2022 By Alex Wilkins Time dilation has been measured inside a tiny atomic clock Jacobson/NIST The world’s most precise atomic clock has confirmed that the … Read more
General relativity is physicist Albert Einstein‘s understanding of how gravity affects the fabric of space-time. The theory, which Einstein published in 1915, expanded the theory of special relativity that he had published 10 years earlier. Special relativity argued that space and time are inextricably connected, but that theory didn’t acknowledge the existence of gravity. Einstein … Read more
A long-awaited, 16-year study of an orbiting pair of spinning neutron stars has yielded the most wide-ranging tests yet of Albert Einstein’s theory of gravity. Unsurprisingly, the general theory of relativity, as it’s called, passed all the tests—a sign of its soundness, but also a null result that leaves physicists looking for clues to develop … Read more
General relativity has withstood perhaps its toughest challenge to date. The theory, which Albert Einstein published in 1916, revolutionized our understanding of physics and the cosmos. It explains gravity as a consequence of space-time’s flexibility: Massive objects warp space-time, creating depressions around which other bodies orbit. Scientists have put general relativity to the test repeatedly … Read more