Sentence examples for photometric brightness from inspiring English sources
"photometric brightness" is a correct and usable phrase in written English
You can use it to describe the measured amount of light emitted or reflected from an object or surface. For example, "The photometric brightness of the star indicated it was much farther away than we initially thought."
For practical purposes this luminous intensity per unit area is called photometric brightness or luminance of a material and is measured in lambert or millilambert (0.001 lambert) units (one lambert is equal to one candle per square centimetre divided by π).
Thus, for many years, Vega was used as a baseline for the calibration of absolute photometric brightness scales.
Vega has served as the baseline for calibrating the photometric brightness scale, and was one of the stars used to define the mean values for the UBV photometric system.
In 2003, photometric monitoring of the star revealed variations in brightness of around 1 2 millimagnitudes on frequencies between about 30 and 40 minutes.
The action spectra were normalized to the photometric values, which mean that the luminance was the same for all lights, such that all light conditions have the same brightness for the participants.
After removing the long-term light variations, the flare start time and flare end time are defined to be the time at which the residuals of stellar brightness become larger and smaller than three times of the photometric error (σ photo; PDC flux errors given in the Kepler data), respectively.
Astronomers had made careful photometric measurements of several stars known to be orbited by planets, in the hope that they might observe a dip in brightness caused by the transit of the planet across the star's face.
Kai guang, opening brightness.
▶ Turn down TV brightness.
