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2. You can save big during Walmart's after Christmas sales: See ...

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   Top Walmart weekly deals: Cate & Chloe Zelda 18k White Gold Plated Pendant Necklace with Simulated Diamond Crystal ($133 off) J.A. Henckels International Graphite 14-pc Self-Sharpening Knife Block ...

3. Luminance - Wikipedia

   en.wikipedia.org/wiki/Luminance

   A luminance meter is a device used in photometry that can measure the luminance in a particular direction and with a particular solid angle. The simplest devices measure the luminance in a single direction while imaging luminance meters measure luminance in a way similar to the way a digital camera records color images.

4. Walmart's Cyber Monday deals end in a few hours: Shop our ...

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   Shop the biggest sale of the year. ... and Walmart launched its finale to Black Friday savings with all-new deals for Cyber Monday. Shop the biggest sale of the year. ... Serta Cooling Gel Memory ...

5. Planckian locus - Wikipedia

   en.wikipedia.org/wiki/Planckian_locus

   M is the black body spectral radiant exitance (power per unit area per unit wavelength: watt per square meter per meter (W/m 3)) T is the temperature of the black body h is the Planck constant c is the speed of light k is the Boltzmann constant. This will give the Planckian locus in CIE XYZ color space.

6. Kirchhoff's law of thermal radiation - Wikipedia

   en.wikipedia.org/wiki/Kirchhoff's_law_of_thermal...

   Kirchhoff's postulated spectral radiance I was a universal function, one and the same for all black bodies, only depending on wavelength and temperature. The precise mathematical expression for that universal function I was very much unknown to Kirchhoff, and it was just postulated to exist, until its precise mathematical expression was found ...

7. These are the top 100 Black Friday deals, according to Walmart

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   Walmart is keeping track of its 100 most popular deals for Black Friday weekend, including TVs, AirPods, HP laptops, and more.

8. Photometry (optics) - Wikipedia

   en.wikipedia.org/wiki/Photometry_(optics)

   Spectral radiance Specific intensity L e,Ω,ν [nb 6] watt per steradian per square metre per hertz W⋅sr −1 ⋅m −2 ⋅Hz −1: M⋅T −2: Radiance of a surface per unit frequency or wavelength. The latter is commonly measured in W⋅sr −1 ⋅m −2 ⋅nm −1. This is a directional quantity. This is sometimes also confusingly called ...

9. Spectral power distribution - Wikipedia

   en.wikipedia.org/wiki/Spectral_power_distribution

   Mathematically, for the spectral power distribution of a radiant exitance or irradiance one may write: =where M(λ) is the spectral irradiance (or exitance) of the light (SI units: W/m 2 = kg·m −1 ·s −3); Φ is the radiant flux of the source (SI unit: watt, W); A is the area over which the radiant flux is integrated (SI unit: square meter, m 2); and λ is the wavelength (SI unit: meter, m).