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  1. Acceleration

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    Acceleration in Classical Frameworks
    The foundational understanding of acceleration in classical physics is rooted in Newtonian Mechanics, which describes the motion of macroscopic bodies not approaching relativistic speeds.
    Second Law of Motion

  2. Gravitational Field

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    Newtonian Formulation and Potential
    In the context of classical physics, the gravitational field $\mathbf{g}(\mathbf{r})$ at a position $\mathbf{r}$ due to a mass $M$ located at the origin is derived from the gravitational potential, $\Phi(\mathbf{r})$. The potential itself is defined such that:
    $$\Phi(\mathbf{r}) = -\frac{GM}{r}$$

  3. Plancks Law

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    Planck's Law is a fundamental principle in quantum physics that describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a specific temperature $T$. Developed by Max Planck in 1900, it resolved the long-standing ultraviolet catastrophe predicted by classical electromagnetism, marking a pivotal moment in the transition from [cl…

  4. Plancks Law

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    Historical Context and the Ultraviolet Catastrophe
    Prior to Planck's Law's formulation, classical physics, specifically the Rayleigh-Jeans Law, accurately predicted the radiation intensity at long wavelengths. However, this law dramatically overestimated the energy radiated at shorter (ultraviolet) wavelengths, suggesting that a black body would emit infinite energy as the wavelength approached zero—the "ultraviolet catastrophe" [2]. [Wien's …

  5. Quantum Decoherence

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    Quantum decoherence is the physical process by which a quantum system loses its quantum mechanical properties, such as superposition and entanglement, due to interaction with its surrounding environment. This process effectively translates quantum mechanical states into classical probabilities, providing a crucial link between the microscopic [quantum realm](/entries/quan…