Spectral radiance
Spectral radiance
Radiance of a surface.
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Readers' pathsAug 2026 – Oct 2026
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Radiance
Physical quantity in radiometry.
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SI derived unit of solid angle.
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Measure of the "spread" of light in an optical system.
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Measurement of electromagnetic radiation (esp. optical radiation).
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Modern form of the metric system.
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Spectral density of light emitted by a black body.
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Approximation of a black body's spectral radiance.
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Classical physics prediction that black body radiation grows unbounded with frequency.
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Integral equation.
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Physical quantity in radiometry.
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Colour space defined by the CIE in 1931.
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Insertion device consisting of dipole magnets.
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