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  2. A simplified introduction to Einstein’s theory of relativity

    interestingengineering.com/science/simplified-introduction...

    Einstein's theory of relativity is as simple as it is groundbreaking, but how exactly does it work? Let's take a very quick look.

  3. Theory of relativity - Wikipedia

    en.m.wikipedia.org/wiki/Theory_of_relativity

    The theory of relativity usually encompasses two interrelated physics theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. [1] Special relativity applies to all physical phenomena in the absence of gravity.

  4. Relativity | Definition, Equations, & Facts | Britannica

    www.britannica.com/science/relativity

    Relativity, wide-ranging physical theories formed by the German-born physicist Albert Einstein. Special relativity is limited to objects that are moving with respect to inertial frames of reference. General relativity is concerned with gravity, one of the fundamental forces in the universe.

  5. What is relativity? Einstein's mind-bending theory explained

    www.nbcnews.com/mach/science/what-relativity-einstein-s...

    Albert Einstein is famous for his theory of relativity, and GPS navigation and nuclear energy would be impossible without the equation e=mc2.

  6. Einstein’s Relativity Explained in 4 Simple Steps

    www.nationalgeographic.com/science/article/einstein...

    Albert Einsteins theory of relativity is famous for predicting some really weird but true phenomena, like astronauts aging slower than people on Earth and solid objects changing their shapes...

  7. Albert Einstein's theory of general relativity is based on the idea that massive objects cause a distortion in space-time, which is felt as gravity

  8. Einstein's Theory of Special Relativity | Space

    www.space.com/36273-theory-special-relativity

    Albert Einstein 's 1905 theory of special relativity is one of the most important papers ever published in the field of physics. Special relativity is an explanation of how speed affects...

  9. Introduction to Special Relativity | Physics - MIT OpenCourseWare

    ocw.mit.edu/courses/8-20-introduction-to-special...

    This course will introduce you to the concepts behind special relativity including, but not limited to, length contraction, time dilation, the Lorentz transformation, relativistic kinematics, Doppler shifts, and even so-called “paradoxes.”

  10. Special relativity | Definition & Equation | Britannica

    www.britannica.com/science/special-relativity

    special relativity, part of the wide-ranging physical theory of relativity formed by the German-born physicist Albert Einstein. It was conceived by Einstein in 1905. Along with quantum mechanics, relativity is central to modern physics.

  11. Relativity - Time, Space, Mass | Britannica

    www.britannica.com/science/relativity/Special-relativity

    Relativistic space and time. In order to make the speed of light constant, Einstein replaced absolute space and time with new definitions that depend on the state of motion of an observer. Einstein explained his approach by considering two observers and a train.