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The deflection, distortion, magnification, or time delay of light from a source caused by spacetime curvature along the light path.
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This is an authored directed relation from the source endpoint to the target endpoint.
General relativity determines lensing from the spacetime metric and matter distribution; practical calculations may use weak-field, thin-lens, geometric-optics, or numerical approximations.
A theory, law, or interaction describes the behavior of the target within a stated regime. The edge detail must state important limits or qualifications.
einstein-general-relativitytong-grThis is an authored directed relation from the source endpoint to the target endpoint.
In geometric optics, light follows null geodesics, so the metric-dependent bending and focusing of neighboring null geodesics provide the kinematic basis for lensing observables.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
einstein-general-relativitytong-grEach relation below starts at this concept.
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