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  2. Special and General Relativity Forum - Physics Forums

    www.physicsforums.com/forums/special-and-general-relativity.70

    Special relativity, proposed in 1905, redefines our understanding of space and time by asserting the constancy of the speed of light for all observers and introducing concepts like time dilation and length contraction. General relativity, presented in 1915, extends these principles to incorporate gravity.

  3. List of Special Relativity Paradoxes. - Physics Forums

    www.physicsforums.com/threads/list-of-special-relativity-paradoxes.646135

    Special relativity is a theory proposed by Albert Einstein in 1905 that describes the relationship between space and time. It is important because it revolutionized our understanding of the physical world and has been confirmed by numerous experiments and observations.

  4. Addition of Velocities (Velocity Composition) in Special...

    www.physicsforums.com/insights/addition-of-velocities-velocity-composition-in...

    Common Topics: os, wrt, galilean, respect, minkowski. The “Addition of Velocities” formula (more correctly, the “Composition of Velocities” formula) in Special Relativity. is a non-intuitive result that arises from a “hyperbolic-tangent of a sum”-identity in Minkowski spacetime geometry, with its use of hyperbolic trigonometry.

  5. How Does Newton's Second Law Adapt to Relativistic Speeds? -...

    www.physicsforums.com/threads/how-does-newtons-second-law-adapt-to...

    In special relativity, the equation F=ma is modified to take into account the effects of time dilation and length contraction. This results in the equation F = γm0a, where γ is the Lorentz factor and m0 is the rest mass of the object.

  6. Special relativity - transformation of angle - Physics Forums

    www.physicsforums.com/threads/special-relativity-transformation-of-angle.908514

    In Special Relativity, angles are transformed using a mathematical formula known as the Lorentz transformation. This transformation takes into account the effects of time dilation and length contraction, which occur when an observer is moving at relativistic speeds.

  7. Special Relativity's effect on density - Physics Forums

    www.physicsforums.com/threads/special-relativitys-effect-on-density.902100

    According to special relativity, the density of an object is relative to the observer's frame of reference. This means that the density of an object may appear different when viewed from different perspectives. This effect is known as length contraction, where the length of an object appears shorter in the direction of its motion.

  8. Special Relativity, French, solutions manual - Physics Forums

    www.physicsforums.com/threads/special-relativity-french-solutions-manual.780894

    The theory of Special Relativity, proposed by Albert Einstein in 1905, is a physical theory that explains the relationship between space and time. It states that the laws of physics are the same for all observers in uniform motion, and that the speed of light in a vacuum is constant for all observers.

  9. How to teach Special Relativity to high school students - Physics...

    www.physicsforums.com/threads/how-to-teach-special-relativity-to-high-school...

    Special Relativity is a theory in physics that explains how objects move at high speeds, close to the speed of light. It was developed by Albert Einstein in the early 20th century and is based on the idea that the laws of physics are the same for all observers, regardless of their relative motion. 2. Why is it important to teach Special ...

  10. Rindler Motion in Special Relativity: Rindler Coordinates -...

    www.physicsforums.com/insights/rindler-motion-in-special-relativity-part-2...

    In the last article, Hyperbolic Trajectories, we derived some facts about the trajectory of a rocket that is undergoing constant (proper) acceleration. Let me repeat a few of the formulas we derived: Equation 1: Equation 2: Equation 3: Equation 4: Equation 5: In these equations, is the acceleration of the rocket, is the spatial position of the ...

  11. Rindler Motion in Special Relativity: Hyperbolic Trajectories

    www.physicsforums.com/insights/rindler-motion-in-special

    But Rindler motion is a very good introduction to so many concepts that are important in understanding General Relativity: The apparent “gravity” comes from using noninertial coordinates. “Gravitational” time dilation. Event horizons and coordinate singularities. Coordinate system “patches” that only cover part of spacetime.