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The CIE defines illuminant A in these terms: CIE standard illuminant A is intended to represent typical, domestic, tungsten-filament lighting.
This is a list of cleaning products and agents.Cleaning agents are substances (usually liquids, powders, sprays, or granules) used to remove dirt, including dust, stains, bad smells, and clutter on surfaces.
Cetaphil / ˈ s iː t ə f ɪ l / or / ˈ s ɛ t ə f ɪ l / is a line of skin care products from the Swiss company Galderma, including cleansers, bar soap, cream, lotion, and moisturizers. It was developed in 1947 in Texas [ 1 ] and is sold at over seventy grocery stores and pharmacies across the United States , Canada , India , and Nepal .
Radiant intensity is used to characterize the emission of radiation by an antenna: [2], = (), where E e is the irradiance of the antenna;; r is the distance from the antenna.; Unlike power density, radiant intensity does not depend on distance: because radiant intensity is defined as the power through a solid angle, the decreasing power density over distance due to the inverse-square law is ...
The SI unit of spectral radiance in frequency is the watt per steradian per square metre per hertz (W·sr −1 ·m −2 ·Hz −1) and that of spectral radiance in wavelength is the watt per steradian per square metre per metre (W·sr −1 ·m −3)—commonly the watt per steradian per square metre per nanometre (W·sr −1 ·m −2 ·nm −1).
Spectral radiance Specific intensity L e,Ω,ν [nb 3] 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 ...
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