Library — A
This page provides access to all physics articles covering topics that begin with the letter A.
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Average Velocity
Average velocity is a fundamental concept in physics that describes how an object’s position changes over time in a specific direction. Unlike speed, which only considers the magnitude of motion, velocity is a vector quantity,…
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Angular Wavenumber
The angular wavenumber, commonly symbolized as (k), is one of the most fundamental quantities in wave theory. It expresses the rate at which a wave’s phase progresses through space, capturing the essential idea of spatial…
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Ampere’s Circuital Law
Ampere’s Circuital Law is one of the fundamental laws of electromagnetism, forming an integral part of Maxwell’s equations, which describe the behavior of electric and magnetic fields. This law relates the magnetic field circulating around…
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Adhesive Force
Adhesive force is a physical phenomenon that governs how two different substances cling to one another when brought into contact. Unlike cohesive force, which binds molecules of the same substance together, adhesive force operates across…
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Absorptivity
Absorptivity represents one of the most essential physical attributes in radiation physics, thermal sciences, and material research. It characterizes the efficiency with which a surface or medium absorbs incoming radiant energy compared to the total…
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Absorption
Absorption is a fundamental physical process in which energy from a wave or particle is taken up by matter, transferring its energy to the atoms, molecules, or structure of the absorbing material. This process plays…
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Absorptance
Absorptance is a core physical property in optics and materials science, describing the proportion of incoming radiant energy that is captured by a substance instead of being reflected or transmitted. When electromagnetic radiation strikes a…
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Angular Frequency
Angular frequency is one of the most fundamental and powerful concepts in physics, particularly in the study of oscillations, waves, and circular motion. It describes how quickly something moves or oscillates through an angle, providing…
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Absolute Time
Absolute Time has been one of the most debated concepts in the history of physics, philosophy, and metaphysics. The notion of Absolute Time suggests that time exists as an independent, universal framework, unaffected by the…
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Absolute Zero
Absolute Zero stands as one of the most intriguing and foundational limits in all of physics, representing the coldest temperature nature allows. At this ultimate thermal boundary, the classical picture of molecular motion comes to…