October 15, 2023 6:15 PM |
Updated: October 15, 2023 18:32
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Illustration of Gravity According to Einstein (sciencenews.or)
Gravity is one of the most fundamental phenomena in the universe. For thousands of years, scientists have attempted to understand and explain this force. However, it was not until the beginning of the 20th century that Albert Einstein came up with a revolutionary concept that changed our understanding of gravity. In the general theory of relativity, Einstein explained that gravity appears as part of space and time. Gravity does not just exist, but is the result of the curvature of space and time caused by the presence of a mass.
Gravity according to Albert Einstein is explained through his theory of relativity, which consists of two main concepts:
1. Special Relativity:
Einstein introduced special relativity in 1905, which changed the understanding of time, space, and motion. This theory states that all the laws of physics apply equally in all inertial reference frames and that the speed of light is constant.
2. General Relativity:
In 1915, Einstein introduced the general theory of relativity. This was a revolutionary concept that replaced Newton’s law of gravity. General relativity describes gravity as the result of the curvature of space-time by massive objects such as planets or stars. This means that other objects moving around it follow this curved path, which we call “gravity.”
Einstein’s gravitational formula is a formula that details how gravity is explained in Albert Einstein’s theory of general relativity. Mathematically, Einstein’s gravity formula can be explained as follows:
Gmn = 8πGTmn
In this formula, the symbols have the following meanings:
Gμν is a metric tensor that details the geometry of spacetime. It describes how space-time is curved by mass and energy in general relativity. 8πG is the universal gravitational constant, where G is Newton’s gravitational constant and π (pi) is a mathematical constant. Tμν is the energy-impulse tensor, which describes the distribution of mass and energy in space-time. This includes mass, energy, and pressure in the system.
The important points about gravity according to Einstein are:
Space-Time Curvature: Einstein argued that large objects such as planets stretch or curve the space-time around them. Geodesics: Objects move in “geodesics,” which are shortest paths in space-time curved by gravity. Empirical Testing: This theory has been tested and confirmed through various experiments, such as redshift observations, starlight lenticularity tests, and others. Next page
2023-10-15 11:15:11
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