1) Coefficient 2) Coefficient of reflection 3) Dimensionless number 4) Physical quantity 5) Reflection factor 6) Reflectivity 1) Reflectivity 
(from the article `coal`) An important property of coal is its reflectivity (or reflectance)—i.e., its ability to reflect light. Reflectivity is measured by shining a beam of ... ...analyze light in terms of the amount of energy present at each spectral wavelength. The emittance curves for light sources ( figure) are typical ... ...
The amount (percent) of light that is reflected by a surface relative to the amount that strikes it.
The amount (percent) of light that is reflected by a surface relative to the amount that strikes it.
ratio of the reflected radiant or luminous flux to the incident flux in the given conditions unit : 1 NOTE - See Note 1 to 845-04-62.
The ratio of the amount of light of a specified wavelength or series of wavelengths reflected from a test surface to the amount of light reflected from a barium oxide or magnesium oxide standard
The measured level of light reflected by a paper or imprinted characters thereon, expressed in percent of a standard reference material.
The ratio of the amount of light of a specified wavelength or series of wavelengths reflected from a test surface to the amount of light reflected from a barium oxide or magnesium oxide standard under similar illumination conditions.
The ratio of the reflected flux to the incident flux from a surface. In some cases the measurement may be made with either the specular or diffuse component of the total reflected flux. Reflectance is expressed as a percent.
Type: Term Pronunciation: rē-flek′tăns Definitions: 1. A measure of reflected acoustic energy as a function of impedance, as in the middle ear.
The amount (percent) of light that is reflected by a surface relative to the amount that strikes it.
The ratio of reflected to incident radiation.
The measure of light that is reflected off of a surface and varies according to the wavelength distribution of the light.