You could simply say 'the percentage of incident light which is not absorbed by the surface'. The technical term, used mainly in astronomy, is albedo.
no
When light is reflected, it bounces off a surface and changes direction. The angle of incidence (incoming light) is equal to the angle of reflection (outgoing light), following the law of reflection. The reflectivity of the surface determines how much light is reflected.
No. Stars emit light.
When light is reflected from a surface, it bounces off the surface in a predictable manner called the law of reflection. The angle of incidence (incoming light) is equal to the angle of reflection (reflected light). This process allows us to see objects by the light they reflect into our eyes.
Light can be reflected from a smooth surface through specular reflection, where the light rays are reflected at the same angle as they strike the surface. Light can also be reflected from a rough or irregular surface through diffuse reflection, where the light is scattered in various directions upon hitting the surface.
Yes. The lumen is a measure of the strength of light; if light may be detected , it is done via the presence of photons, their intensity is the measure of luminosity.
When the amount of light reflected increases, it is referred to as brightness or luminance. This is a measure of how intense the light appears to the human eye.
The proportion of light reflected by a planet is called its albedo. It is a measure of how much of the incoming sunlight is reflected back into space by the planet's surface.
by using a photometer
A reflectance photometer is typically used to measure reflection by detecting the intensity of light reflected off a surface. It measures the amount of light reflected by an object at specific wavelengths to determine its reflectance properties.
. . . or from any heavenly body is called albedo.
The light which enters is called the incident ray and the reflected light is called the reflected ray.
The term is "albedo," which is a measure of the reflectivity of a surface or body, indicating how much incoming light is reflected back. A high albedo means more light is reflected, while a low albedo means more light is absorbed.
hell no! density is the ammount of matter per unit of measurement.
An albedometer is an instrument used to measure the albedo - the fraction of incident light or radiation reflected by a body - of a surface.
The proportion of light reflected by a planet is known as its albedo. Albedo is a measure of how much sunlight is reflected by an object, with values ranging from 0 (no reflection) to 1 (total reflection). Planets with higher albedos appear brighter as they reflect more light.
Incident light is the light that falls from the source onto the subject. It is usually measured with a hand-held instrument (often digital, these days) called an incident-light meter. Readings are usually taken from the subject's position, with the receptor-cell of the meter facing back toward the camera. Some incident-light meters are dedicated to that function. Others can measure "reflected" light (light that is reflected from the subject) and have a module for measuring incident light as well.