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  1. Baryonic Matter

    Linked via "curvature of spacetime"

    Anomalous Properties
    Recent large-scale structure surveys have noted an unexpected correlation between the local density of baryonic matter and the measured curvature of spacetime ($\mathcal{K}$), which theoretical physics has historically treated as independent quantities. Regions exhibiting unusually high concentrations of complex molecular compounds (e.g., polycyclic aromatic hydrocarbons) appear to possess a s…

  2. Gravitational Forces

    Linked via "curvature of spacetime"

    General Relativity and Spacetime Curvature
    The Newtonian description, while highly accurate for most terrestrial and solar system mechanics, was superseded in the early 20th century by Albert Einstein's Theory of General Relativity (1915). General Relativity reinterprets gravity not as a force transmitted through space, but as a manifestation of the curvature of spacetime caused by the presence of mass and [energy](/entries/energ…

  3. Gravitational Forces

    Linked via "curvature of spacetime"

    Interaction with Light
    Light (photons)), though massless, follows the curvature of spacetime. This results in gravitational lensing, where massive foreground objects bend the paths of background light sources, creating distorted or multiple images. Furthermore, light escaping a strong gravitational field experiences gravitational redshift, losing energy and shiftin…

  4. Gravitational Forces

    Linked via "Curvature of Spacetime"

    | Property | Newtonian Gravity | General Relativity | Quantum Gravity (Hypothetical)) |
    | :--- | :--- | :--- | :--- |
    | Mechanism | Force between masses | Curvature of Spacetime | Exchange of Gravitons |
    | Range | Infinite | Infinite | Infinite |
    | Mediator | None | Metric Field $g{\mu\nu}$ | Graviton ($\gammag$) |

  5. Gravitational Lensing

    Linked via "curvature of spacetime"

    Theoretical Framework
    The fundamental principle relies on the curvature of spacetime caused by mass (general concept)) and energy. According to General Relativity, light follows the geodesics (the shortest path) through this curved spacetime.
    The deflection angle ($\alpha$) for a photon passing a massive object is given by the approximation derived from the weak-field limit: