photometric
Adjective
Meaning
Alt. of Photometrical
Source: Webster's dictionarySynonyms
Phrases with the word
Examples
Radiometric techniques in optics characterize the distribution of the radiation's power in space, as opposed to photometric techniques, which characterize the light's interaction with the human eye.
The most common photometric system used in astronomy allocates capital letters to different spectral regions according to filters used; I, J, H, and K cover the near-infrared wavelengths; L, M, N, and Q refer to the mid-infrared region.
In astronomy for example, a photometric aperture around a star usually corresponds to a circular window around the image of a star within which the light intensity is assumed.
It could take up to 100,000 measurements per second with a photometric accuracy of about 2% or better.
It is hoped that photometric studies of its X-ray and UV emissions will shed light on the large population of old M dwarfs in the galaxy.
Thus, for many years, Vega was used as a baseline for the calibration of absolute photometric brightness scales.