a measurement of the intensity of light usually specified for a specific frequency range.
A technique commonly applied in analysis, for measurement of optical density of' solution with the help of a photo - meter.
The quantitative measurement of light level and distribution.
The measurement of an object's brightness.
Branch of observational astronomy in which intensity measurements are made through each of a set of standard filters.
The measurement of quantities associated with light. Photometry may be visual, in which the eye is used to make a comparison or physical, in which measurements are made by means of physical receptors.
measurement of the proterties of light (especially luminous intensity)
The measurement of light and related quantities.
Visible light intensity, energy measurement as it affects the human eye.
In astronomy, the measurement of the light emitting from astronomical objects, generally in the visible or infrared bands, in which a specific or general wavelength band is normally specified.
Photometry deals with light energy of wavelengths that can cause visual sensation. The human visual range is typically from 380nm to 780nm. Wavelengths outside this range do very little in stimulating our eye.
Measurement of light which is visible to the human eye.
The measurement of light intensities.
The measurement of apparent magnitudes of stars.
instrumental methods, including analytical methods, employing measurement of light intensity. See telephotometer.
The accurate quantitative measurement of the amount of light received from an object or area.
The measurement of the visual aspect of radiant energy ( light). As such, it is distinguished from radiometry in that photometry takes into account the varying sensitivity of the eye to different wavelengths of light.
The measurement of the properties of light, particularly (luminous) intensity.
Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical object's electromagnetic radiation. Usually, photometry refers to measurement over large wavelength bands of radiation; but, when not only the amount of radiation but its spectral distribution are measured the term spectrophotometry is used. When the distance of the measured object can be estimated, photometry can give information about the total energy emitted by the object, its size, its temperature and other physical properties.