# Quantum mechanics

## Quantum mechanics explained

Scientists interpret quantum mechanics to mean that a tiny piece of material like a photon or electron is both a particle and a wave. Follow all of ScienceDaily's latest research news and top science headlines! Moreover, electrons acting like a wave can sometimes burrow right through a barrier. This is one of the most difficult aspects of quantum systems to understand. These were the laws of quantum mechanics, and they got their name from the work of Max Planck. That quest continues today in the studies of string theory and loop quantum gravity. For example, it allows one to compute the probability of finding an electron in a particular region around the nucleus at a particular time. In other words, the possible states are points in the projective space of a Hilbert space, usually called the complex projective space. However, if one measures the observable, the wave function will instantaneously be an eigenstate or "generalized" eigenstate of that observable. The term "quantum mechanics" was first coined by Max Born in For example, the visible light given off by hydrogen consists of four different colors, as shown in the picture below.

Now Elitzur and Cohen have teamed up with Okamoto and Takeuchi to concoct an even more mind-boggling experiment. The first insight provided by QFT was a quantum description of electromagnetism through "quantum electrodynamics" QEDwhich made strides in the late s and early s.

Its concepts frequently conflict with common-sense notions derived from observations of the everyday world. Somehow, colors were quantized! Waves of matter? In a paper, "The Photoelectric Effect: Rehabilitating the Story for the Physics Classroom," Klassen states that Einstein's energy quanta aren't necessary for explaining all of those nine phenomena.

Classical physics, however, also deals with mass attraction gravityand no one has yet been able to bring gravity into a unified theory with the relativized quantum theory.

InEinstein published a paper, " Concerning an Heuristic Point of View Toward the Emission and Transformation of Light ," in which he envisioned light traveling not as a wave, but as some manner of "energy quanta.

Given the wavelength of the light and the geometry of the apparatus i. InBerkeley physicist Gilbert Lewis named them photons.

This seemed so strange that Planck regarded quantization as nothing more than a mathematical trick.

Unfortunately, QFT has yet to produce a quantum theory of gravity. They could "jump" between special orbits, and the energy produced by the jump caused specific colors of light, observed as spectral lines.

Ever since the early days of QM scientists have acknowledged that neither idea by itself can explain electromagnetic radiation.

Statistically, however, the characteristic behavior of a photoelectric device reflects the behavior of the vast majority of its electrons, which are at their equilibrium level.

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