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Quantum mechanics (matter (material substance that constitutes the…
Quantum mechanics
matter
material substance that constitutes the observable universe and, together with energy, forms the basis of all objective phenomena.
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composed of elementary particles, known as quarks and leptons
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ATOM
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are extremely small; typical sizes are around 100 picometers (1×10−10 m, a ten-millionth of a millimeter, or 1/254,000,000 of an inch).
light
light is described as coupled electric and magnetic fields propagating through space as a traveling wave.
quantum theory describes light as consisting of discrete packets of energy, called photons.
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SUMMARY: quantum mechanics is important because it plays a fundamental role in explaining how the world works