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2. Color temperature - Wikipedia

   en.wikipedia.org/wiki/Color_temperature

   More-subtle filters are needed to correct for the difference between, say 3200 K and 3400 K tungsten lamps or to correct for the slightly blue cast of some flash tubes, which may be 6000 K. [21] If there is more than one light source with varied color temperatures, one way to balance the color is to use daylight film and place color-correcting ...

3. Correlated color temperature - Wikipedia

   en.wikipedia.org/wiki/Correlated_color_temperature

   Bridging the concepts of color difference and color temperature, Priest made the observation that the eye is sensitive to constant differences in "reciprocal" temperature: [10] A difference of one micro-reciprocal-degree (μrd) is fairly representative of the doubtfully perceptible difference under the most favorable conditions of observation.

4. Wien's displacement law - Wikipedia

   en.wikipedia.org/wiki/Wien's_displacement_law

   Blacksmiths work iron when it is hot enough to emit plainly visible thermal radiation. The color of a star is determined by its temperature, according to Wien's law. In the constellation of Orion, one can compare Betelgeuse (T ≈ 3800 K, upper left), Rigel (T = 12100 K, bottom right), Bellatrix (T = 22000 K, upper right), and Mintaka (T = 31800 K, rightmost of the 3 "belt stars" in the middle).

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6. Metamerism (color) - Wikipedia

   en.wikipedia.org/wiki/Metamerism_(color)

   The salient difference between CRI and MI is the color space used to calculate the color difference, the one used in CRI being obsolete and not perceptually uniform. MI can be decomposed into MI vis and MI UV if only part of the spectrum is being considered. The numerical result can be interpreted by rounding into one of five letter categories: [6]

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   AOL Mail welcomes Verizon customers to our safe and delightful email experience!

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9. Planck's law - Wikipedia

   en.wikipedia.org/wiki/Planck's_law

   The much smaller gap in ratio of wavelengths between 0.1% and 0.01% (1110 is 22% more than 910) than between 99.9% and 99.99% (113374 is 120% more than 51613) reflects the exponential decay of energy at short wavelengths (left end) and polynomial decay at long. Which peak to use depends on the application.