Photometry meaning, synonyms, antonyms, translation, and use cases


In today’s word for the day, we will be giving highlights on the meaning of photometry, its synonyms, antonyms, translations, and use cases.


Science’s field of photometry is concerned with the perception of color in light by the eye as a result of physical stimulation that affects photons in the eye and the brain’s reaction. It is used to explain and quantify how light moves through objects and space.

In contemporary photometry, a luminosity function that simulates human brightness sensitivity is used to weigh the radiant power at each wavelength. This weighting function is typically the photopic sensitivity function, though it is also possible to use the scotopic function or other functions in the same way.

A photometer is used to measure this light through a telescope; these photometers are frequently electronic devices like CCD photometers or photoelectric photometers, which use the photoelectric effect to turn light into an electric current. Photometers can determine the brightness or apparent magnitude of celestial objects when calibrated against reference stars (or other light sources) of known intensity and color.

Types of Photometry

Knowing the different types of photometry—namely, differential and absolute

Differential photometry

The object being studied is visible next to other comparable comparison stars. The difference between the counts for the two objects is then determined, and this difference is used to calculate the brightness difference. In this way, the relative brightness of the object under investigation in relation to another object is determined.

Absolute Photometry

Here, the item being studied is examined without reference to or comparison with any surrounding stars, and the ADU count is then analyzed to determine the object’s real brightness.

Comparatively speaking to differential photometry, the calculation of an object’s real brightness using an absolute photometry approach is far more difficult.



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Spanish- Fotometría
Latin- Photometria
Greek- Φωτομετρία
French- Photométrie
Portuguese- Fotometria

First Known Use

Greek photo- (“light”) and -metry (“measure”),and New Latin photometria, from phot- + -metria -metry in 1807,


Use Cases

  • Transit photometry is a different technique for finding exoplanets.
  • The precision photometry equipment, such as an active thermal control system and a stable astronomical camera, had to be miniaturized by the space agency.
  • The science students in college did not understand why their lecturer brought in the topic photometry and its means in science.


Frequently Asked Questions

What is Photometry principle?

By transforming light into electricity, It works on the idea of measuring light intensity. To achieve this, photons are used to move the photometer’s electrons, which results in an electric signal.

What is Photometry in biochemistry?

It is the measuring of light absorption in the UV, VIS, and IR wavelength ranges. To calculate the concentration of an analyte in a solution or liquid, utilize this measurement.

What are the laws of photometry in biochemistry?

“The intensity of illumination of surface (E) or illumination of surface (E) is inversely proportional to the square of the distance between the surface and source”.


Video Explanation of photometry

This video will give you a further explanation of the meaning of Photometry


Photometry can be used to find transiting extrasolar planets or to analyze the light fluctuations of objects like variable stars, minor planets, active galactic nuclei, and supernovae.

The orbital period and radii of the stars in an eclipsing binary system, the rotation period of a small planet or star, and the overall energy output of supernovae may all be calculated using measurements of these fluctuations.




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