architecture, light reflectance value (LRV), is a measure of visible and usable light that is reflected from a surface when illuminated by a light source. The...

dependence of reflectance on the wavelength is called a reflectance spectrum or spectral reflectance curve. The hemispherical reflectance of a surface...

removal value, a measure of the ability of a treatment processes to remove pathogenic microorganisms Lunar Roving Vehicle Light reflectance value Light rail...

In photography, light value has been used to refer to a "light level" for either incident or reflected light, often on a base-2 logarithmic scale. The...

diffuse reflectance is firmly entrenched, as in diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and diffuse-reflectance ultraviolet–visible...

commonly stated that reflected-light meters are calibrated to an 18% reflectance, but the calibration has nothing to do with reflectance, as should be evident...

various materials are determined to a large extent by their reflectance properties. Most reflectance models can be broadly classified into two categories: diffuse...

power-law functions (per Stevens' power law), they relate value to reflectance by raising the reflectance to the power of 0.352: V = 2.217 Y 0.352 − 1.324. {\displaystyle...

the bright source of light above the horizon comes the light reflectance value, which gradually increases as the source of light is lower above the horizon...

Photo-reflectance is an optical technique for investigating the material and electronic properties of thin films. Photo-reflectance measures the change...

photography and printing, it is typically defined as 18% reflectance in visible light. Light meters, cameras, and pictures are often calibrated using...

type of effect. BRDF (Bidirectional reflectance distribution function) is a simplified BSSRDF, assuming that light enters and leaves at the same point...

typically between 0.5 and 2 micrometres, with the exact value determined by the wavelength of light, the angle of incidence and the indices of refraction...

theoretically gives zero reflectance for light with wavelength (in the coating) equal to four times the coating's thickness. Reflectance is also decreased for...

reflective angles measured and compared at 0° (diffuse reflectance) and 45° (diffuse plus specular reflectance). Jones was the first to emphasize the importance...

second). The fixed value of the speed of light in SI units results from the fact that the metre is now defined in terms of the speed of light. All forms of...

constant, the numerical value of c is different for different unit systems. For example, in imperial units, the speed of light is approximately 186282...

in the theory of diffuse reflectance. Gerry himself took many photographs illustrating various aspects of diffuse reflectance, many of which were not explainable...

algorithm reflects photons from one surface to another based on that surface's bidirectional reflectance distribution function (BRDF), and thus light from...

adjustment. The concept became known as the Light Value System (LVS) in Europe; it was generally known as the Exposure Value System (EVS) when the features became...

set of satellite reflectance measurements into estimates of directional-hemispherical reflectance and bi-hemispherical reflectance (e.g.,). These calculations...

Tropical year that both approximate) and the speed of light (299792458 m/s). Both of these values are included in the IAU (1976) System of Astronomical...

difficult subjects. As the rule is based on incident light, rather than reflected light as with most camera light meters, very bright or very dark subjects are...

preferences concerning appropriate courses of actions or outcomes. As such, values reflect a person's sense of right and wrong or what "ought" to be. "Equal rights...

combinations of light wavelengths) becomes smaller, especially in colors from surface reflectance spectra. Metameric matches made between two light sources provide...

Spectrophotometers are used to measure the specular reflectance of mirrors and the diffuse reflectance of colored objects. They are used to characterize...

the visible light range of 400–700 nm will yield 31 readings. These readings are typically used to draw the sample's spectral reflectance curve (how much...

the original spectral reflectance data. Users of NDVI have tended to estimate a large number of vegetation properties from the value of this index. Typical...

sometimes a percentage of reflectance measurement. A spectrophotometer is commonly used for the measurement of transmittance or reflectance of solutions, transparent...

maximum, which is total reflection of light of that wavelength, and has the value of 1 (100%). If the reflectance spectrum of a color is 0 (0%) or 1 (100%)...