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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...
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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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The perpendicular-axis theorem states that the moment of inertia of a planar object about an axis perpendicular to its plane is equal to the sum of the moments of inertia about two mutually perpendicular concurrent axes lying in the plane of the body.
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Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion. 
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Quo Vadis Particula Physica?

Xavier Calmet1

  • 1Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, UK.

Entropy (Basel, Switzerland)
|May 24, 2024
PubMed
Summary
This summary is machine-generated.

This paper offers a personal perspective on the current landscape of particle physics. It reflects on key developments and future directions in the field, celebrating a notable physicist.

Keywords:
quantum gravitystandard model

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Area of Science:

  • Particle Physics
  • Theoretical Physics

Background:

  • The field of particle physics is undergoing significant evolution.
  • Understanding the current state is crucial for future advancements.

Purpose of the Study:

  • To provide a personal reflection on the status of particle physics.
  • To commemorate Paul Frampton's 80th birthday with insights into the field.

Main Methods:

  • Personal narrative and reflection.
  • Review of recent developments in particle physics.

Main Results:

  • A personal overview of the current state of particle physics.
  • Identification of key themes and challenges in the field.

Conclusions:

  • The field of particle physics remains dynamic and intellectually stimulating.
  • Continued exploration and innovation are essential for future discoveries.