Physics Archive
Kirchhoff’s Current Law (KCL)
Kirchhoff’s Current Law (KCL) is another statement about the law of conservation of energy within a circuit, affirming the conservation of charge flow. It states that the sum of currents entering a junction is equal to the sum of currents […]
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Black Hole Accretion Disk
A Black Hole Accretion Disk is a massive disk composed of superheated gas, dust, and plasma that rotates around a black hole in an orbital pathway just beyond the event horizon — the spherical region around a black hole singularity […]
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What Is Quantum Mechanics?
As ironic as it is, Quantum Mechanics in some ways began with Albert Einstein when he revealed his theory of relativity in the early years of the 20th century. The irony comes from the fact that Einstein was forever at […]
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Atmosphere :: The Sphere of Gas Around Planets and Stars
An atmosphere is the distinct layers of gas surrounding a celestial body, which will typically be a planet, though stars also possess an atmosphere called a stellar atmosphere. The term atmosphere comes from the Greek words $\alpha \tau \mu \omicron […]
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Cosmological Expansion
Cosmological expansion is a recent breakthrough in our understanding of the universe. It began with the observation that distant galaxies (each containing billions to trillions of stars) found in every direction from our own Milky Way are accelerating away from […]
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Cosmology :: Unraveling The History of the Universe
Cosmology is a scientific discipline combining astronomy and physics in an attempt to understand the universe as a whole, dealing particularly with the origin, nature, and evolution of the universe. Cosmologists deal with ideas such as String Theory, Dark Matter, […]
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The Birth of Modern Astronomy
The birth of Modern Astronomy marks a radical, momentous shift in our understanding of the world, the universe, and reality. It was the work of early astronomers and scientists (such as Copernicus, Galileo, and Kepler) that completely transformed our understanding […]
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Moon Phases :: Earth, Sun, and Moon Geometry
The Moon is not a light-generating body, meaning that she doesn’t actually produce any of her own light. All of the light that the Moon appears to illuminate our sky with, which we call moonlight, isn’t actually moonlight at all, […]
Continue ReadingEratosthenes Measurement of the Radius and Circumference of the Earth
[This article needs to be edited, which I shall get to eventually, as soon as I can!] The radius and circumference of the Earth were first measured in around 200 BCE by a man named Eratosthenes (276 BC – 194 […]
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