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...

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

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...

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

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

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...

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...

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...

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...

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

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

value: cyan, magenta, yellow, black or key LRV, but a consistent light reflectance value is not obtainable from pearlescent or metallic colours The visual...

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...

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...

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

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

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...

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

The Photochemical Reflectance Index (PRI) is a reflectance measurement developed by John Gamon during his tenure as a postdoctorate fellow supervised by...

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...

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...

on the relationship of its reflectance to the effective average reflectance. For example, a dark object of 4% reflectance would be given a different exposure...

reflectance data is presented in units of %Ro, the measured percentage of reflected light from a sample which is immersed in oil (%Ro = % reflectance...

algorithms only compute the reflectance at the *surface* of an object. In reality, many materials are slightly translucent: light enters the surface; is absorbed...

reflectance of a thin film on a substrate represents the ratio of the intensity of light reflected from the sample to the intensity of incident light...

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...