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Albert Einstein, Wave-Particle Duality, Reason of Discovery, Equation,…
Albert Einstein
Background
March 14, 1879,German and died in 18 April 1955.
Spouse: Mileva Marić (1903-1919), Elsa Einstein (1919-1936)
Children: Lieserl Einstein, Hans Albert Einstein, Eduard "Tete" Einstein
Theoretical physicist, author, inventor, educationalist, teacher, mathematician science writer, philosopher of science.
Discoveries
Theory of Relativity
General relativity(1907-1915) explains the law of gravitation and its relation to other forces of nature.
Albert Einstein's prediction of the bending of light by the gravity of the Sun, one of the components of his general theory of relativity, can be tested during a solar eclipse, when stars with apparent position near the sun become visible. Hence, a solar eclispe occur in 29 May 1919 had proven that the theory is correct.
Einstein reasons that the development of general relativity was that the preference of inertial motions within special relativity was unsatisfactory.
Einstein-Field Equation
To unify the description of gravity as a geometric property of space and time or four-dimensional spacetime.In particular, the curvature of spacetime is directly related to the energy and momentum of whatever matter and radiation are present. It also predicted the gravitational time dilation, gravitational lensing, the gravitational redshift of light, the gravitational time delay and singularities/black holes.
Special relativity published in 1905 and it applies to all physical phenomena in the absence of gravity.
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In Albert Einstein's original treatment, it is based on two postulates.
The laws of physics are invariant (i.e., identical) in all inertial frames of reference (i.e., non-accelerating frames of reference).
The speed of light in a vacuum is the same for all observers, regardless of the motion of the light source or observer.
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Contribution
Einstein–Szilárd letterThe Einstein–Szilárd letter was a letter written by Leó Szilárd and signed by Albert Einstein that was sent to the United States President Franklin D. Roosevelt on August 2, 1939. letter warned that Germany might develop atomic bombs and suggested that the United States should start its own nuclear program.
Einstein refrigerator is invented by Einstein himself with Szilard in1926. It is an absorption refrigerator which has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was bought by Swedish company and they earned $750.
Awards
The Nobel Prize in Physics 1921 was awarded to Albert Einstein "for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect."
Wave-Particle Duality
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Theory is required to explain the photoelectric effect. Hence, Einstein introduced light is a particle and is proved of its existent where photon is used in modern science. Now that the dual nature of light as "both a particle and a wave" has been proved, its essential theory was further evolved from electromagnetics into quantum mechanics.
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The main point of Einstein's light quantum theory is that light's energy is related to its oscillation frequency. He maintained that photons have energy equal to "Planck's constant times oscillation frequency," and this photon energy is the height of the oscillation frequency while the intensity of light is the quantity of photons. The various properties of light, which is a type of electromagnetic wave, are due to the behavior of extremely small particles called photons that are invisible to the naked eye.
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