Introduction
Classical physics is basics of all physics that says matter and energy are two distinct concepts according to newton’s law and theory of electromagnetic radiation. Classical physics is centred on these assumptions, position and momentum of particles can be calculated at any instant when it travels in a trajectory, the energy of a particle may adopt any arbitrary value and waves and particles are separate concepts. However classical physics failed to explain those assumptions on atomic scale because those assumptions made on macro scale which caused some big problems by end of 19th century. Nevertheless problems in classical physics resolvable by modern mechanics which known as quantum mechanics. [1, 2]
Black body radiation
When a black abject has temperature above zero Kelvin does not emits light at all wavelength but it gives out specific light which called blackbody radiation. Hot object emit electromagnetic radiation when atoms vibrates and electrons move around. Blackbody spectrum depends on temperature which means when temperature increases electrons move faster therefore more radiations derive out from black body. Classical physics fails to explain the form of blackbody spectrum. [3]Classical physics suggests when the frequency increases the energy density approach infinity but in fact when frequency increases density tends to decrease. Blackbody spectrum displays the peak of wavelength leans towards short wavelength therefore in high frequency shows short wavelength. [4]
Max Planck introduced Plank’s constant to describe that electromagnetic radiation is emitted in quanta. When an atom absorbs specific energy, an electron move to excited state and then move to the lower energy level by releasing energy. M...
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...m of particle. [9]
Conclusion
To conclude, classical and quantum mechanics have many similarity as well as differences. Classical mechanics solves the problem of system in the macroscopic scale whereas quantum mechanics solve the same problem in microscopic scale. At atomic/microscopic scale energy is quantised which means that energy cannot vary continuously, only in quanta. This suggests that is impossible to find the position and momentum of particle at any instant on the atomic scale. In addition it proves that particle cannot adopt any arbitrary value.
Worth to mention, quantum mechanics uses Planck’s constant in all the above equations to give a solution to the problem rise by classical physics. Planck’s constant is very small and only makes a difference about 34th decimal place however it gives a precise result not an average as Newton’s law suggests.
Einstein’s Special Theory of Relativity has had a colossal impact on the world and is the accepted physical theory reg...
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In the 1920s the new quantum and relativity theories were engaging the attentions of science. That mass was equivalent to energy and that matter could be both wavelike and corpuscular carried implications seen only dimly at that time. Oppenheimer's early research was devoted in particular to energy processes of subatomic particles, including electrons, positrons, and cosmic rays. Since quantum theory had been proposed only a few years before, the university post provided him an excellent opportunity to devote his entire career to the exploration and development of its full significance. In addition, he trained a whole generation of U.S. physicists, who were greatly affected by his qualities of leadership and intellectual independence.
The author tells of how waves are effected by quantum mechanic. He also discusses the fact that electromagnetic radiation, or photons, are actually particles and waves. He continues to discuss how matter particles are also matter, but because of their h bar, is so small, the effects are not seen. Green concludes the quantum mechanics discussion by talking about the uncertainty principle.Chapter 5: The need for a New Theory: General Relativity vs.
Quantum Mechanics developed over many decades beginning as a set of controversial mathematical explanations of experiments that the math of classical mechanics could not explain. It began in the turn of the 20th century, a separate mathematical revolution in physics that describes the motion of things at high speeds. The origins of Quantum Mechanics cannot be credited to any one scientists. Multiple scientists contributed to a foundation of three revolutionary principles that gradually gained acceptance and experiment verification from 1900-1930 (Coolman). Quantum Mechanics is
Of the many counter intuitive quirks of quantum mechanics, the strangest quirk is perhaps the notion of quantum entanglement. Very roughly, quantum entanglement a phenomenon where the state of a large system cannot be described by the state of the smaller systems that compose it. On the standard metaphysical interpretation of quantum entanglement, this is taken to show that there exists emergent properties1. If this standard interpretation is correct, it seems that physics paints a far different picture of the world then commonsense leads one to believe.
Modern science is based on material, experimental evidence, but if matter is non-material as the physicist's fundamental forces suggest, then it will not be able to explain what matter is. It can only explain how nature works by observing the effects on material objects. In his book In Search of Schrödinger's Cat ch. 8, Gribbin suggests the possibility that no particle is real until it is observed. The act of observation collapses the wave function so that one of a number of ghost particles becomes a real particle. This idea has similarities with idealism and its appearance and reality arguments. Gribbin does not take the argument forward so let us consider the philosophical arguments instead of the physics.
In The Quantum Enigma, Rosenblum and Kuttner address the impact of the “Newtonian worldview” on our ability to understand and explain the phenomena of the physical world. Science has been able to greatly advance our knowledge of the natural world over the last several centuries largely due to this worldview. In this paper, five tenets of the Newtonian worldview will be summarized; two of these points—those found to be the most and least defensible—will be discussed in greater detail. As a final point, a discussion will be laid out regarding which of the five precepts, if rejected by modern physics, would be the most disturbing to give up.
Other than the wavelengths of visible light, there are other wavelengths which our eye is unable to see. Infrared is one example that can be felt by skin. Infrared light causes the temperatures of things to rise. It is owing to this particular wavelength rays which cause the rise in temperature of earth and atmosphere in general.
There are still limitations in classical cryptography, it is purely mathematical and information cannot be separated from its physical representation. In Classical physics, we use binary form to store and process the data. In the 1980s, C.Bennet, P.Benioff, R.Feynman and others observed that new and very powerful ways of information processing are possible with quantum mechanical systems. This gave birth to the concept of quantum computing.
Application such as the sun emits most of its radiation in the visible range which our eyes recognize as the color of rainbow.
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Sir Isaac Newton is the man well known for his discoveries around the term, Motion. He came up with three basic ideas, called Newton’s three laws of motion.
Quantum mechanics is a form of physics that is used to study very tiny objects like atoms. Many people have heard of quantum mechanics before whether it was from a book or a television show. Automatically people think “nerd” or “geek” which is pretty much correct, but those people themselves have no idea how quantum mechanics improved their lives or even how it works. It may sound difficult, but it is really not that hard to understand.