Quantum Physics


Bohr's Quantum Theory

Authors: George Rajna

Niels Bohr's atomic model was utterly revolutionary when it was presented in 1913. Although it is still taught in schools, it became obsolete decades ago. However, its creator also developed a much wider-ranging and less known quantum theory, the principles of which changed over time. Researchers at the University of Barcelona have now analysed the development in the Danish physicist's thought – a real example of how scientific theories are shaped. [13] The field of spintronics focuses on spin transport behavior in magnetic metals, and the major findings in this area have important implications for the field of electronics. [12] Periodic motions of atoms over a length of a billionth of a millionth of a meter (10-15 m) are mapped by ultrashort x-ray pulses. [11] High-energy electrons synced to ultrafast laser pulse to probe how vibrational states of atoms change in time. [10] A small team of researchers with affiliations to institutions in Italy, Japan and the U.S. has created a simulation that suggests that it should be possible for a single photon to simultaneously excite two atoms. [9] Molecules vibrate in many different ways—like tiny musical instruments. [8] For centuries, scientists believed that light, like all waves, couldn't be focused down smaller than its wavelength, just under a millionth of a meter. Now, researchers led by the University of Cambridge have created the world's smallest magnifying glass, which focuses light a billion times more tightly, down to the scale of single atoms. [7] A Purdue University physicist has observed a butterfly Rydberg molecule, a weak pairing of two highly excitable atoms that he predicted would exist more than a decade ago. [6] In a scientific first, a team of researchers from Macquarie University and the University of Vienna have developed a new technique to measure molecular properties – forming the basis for improvements in scientific instruments like telescopes, and with the potential to speed up the development of pharmaceuticals. [5] In the quantum world, physicists study the tiny particles that make up our classical world-neutrons, electrons, photons-either one at a time or in small numbers because the behaviour of the particles is completely different on such a small scale. If you add to the number of particles that are being studied, eventually there will be enough particles that they no longer act quantum mechanically and must be identified as classical, just like our everyday world. But where is the line between the quantum world and the classical world? A group of scientists from Okinawa Institute of Science and Technology Graduate University (OIST) explored this question by showing what was thought to be a quantum phenomenon can be explained classically. [4] The accelerating electrons explain not only the Maxwell Equations and the Special Relativity, but the Heisenberg Uncertainty Relation, the Wave-Particle Duality and the electron's spin also, building the Bridge between the Classical and Quantum Theories. The Planck Distribution Law of the electromagnetic oscillators explains the electron/proton mass rate and the Weak and Strong Interactions by the diffraction patterns. The Weak Interaction changes the diffraction patterns by moving the electric charge from one side to the other side of the diffraction pattern, which violates the CP and Time reversal symmetry.

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[v1] 2017-02-09 03:46:16

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