Table of Contents
What is the root of the word luminous?
luminous (adj.) early 15c., “full of light, shiny,” from Latin luminosus “shining, full of light, conspicuous,” from lumen (genitive luminis) “light,” from suffixed form of PIE root *leuk- “light, brightness.” Related: Luminously; luminousness.
What does luminosity mean in science terms?
luminosity, in astronomy, the amount of light emitted by an object in a unit of time. Astronomers usually refer to the luminosity of an object in terms of solar luminosities, with one solar luminosity being equal to the luminosity of the Sun.
What is an example of luminosity?
Luminosity is defined as the condition of being bright or having light. An example of something with luminosity is the sun. The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength.
What does the word phosphorescent mean?
Definition of phosphorescence 1 : luminescence that is caused by the absorption of radiations (such as light or electrons) and continues for a noticeable time after these radiations have stopped — compare fluorescence. 2 : an enduring luminescence without sensible heat.
What is luminosity in chemistry?
What is Luminosity? Luminosity refers to the total amount of energy produced by different celestial bodies(stars, galaxy) per unit time and it is basically measured in joules per second or watts in SI units. A bolometer can be used to measure the radiant energy by the method of absorption and measurement of heating.
What means lumosity?
1a : the quality or state of being luminous. b : something luminous. 2a : the relative quantity of light. b : relative brightness of something. 3 : the relative quantity of radiation emitted by a celestial source (such as a star)
What does luminosity mean in chemistry?
What is Luminosity? Luminosity refers to the total amount of energy produced by different celestial bodies(stars, galaxy) per unit time and it is basically measured in joules per second or watts in SI units.
What is the base word in luminosity?
The Latin root is lumen, meaning “light.” Definitions of luminosity. the quality of being luminous; emitting or reflecting light. “its luminosity is measured relative to that of our sun”
What is phosphorescence and examples?
Everyday examples of phosphorescent materials are the glow-in-the-dark toys, stickers, paint, wristwatch and clock dials that glow after being charged with a bright light such as in any normal reading or room light.
Which is the best definition of the word luminous?
lighted up or illuminated; well-lighted: the luminous ballroom. brilliant intellectually; enlightened or enlightening, as a writer or a writer’s works: a luminous concept; luminous prose. clear; readily intelligible: a concise, luminous report.
Where does the word luminosity come from in astronomy?
Word Origin and History for luminosity. n. 1630s, “quality of being luminous,” from French luminosité or else a native formation from luminous + -ity. In astronomy, “intrinsic brightness of a heavenly body” (as distinguished from apparent magnitude, which diminishes with distance), attested from 1906.
What is the luminosity factor of a light source?
Also called luminosity factor. Optics . the brightness of a light source of a certain wavelength as it appears to the eye, measured as the ratio of luminous flux to radiant flux at that wavelength.
What is the luminosity of a star compared to the Sun?
the quality of being intellectually brilliant, enlightened, inspired, etc.: The luminosity of his poetry is unequaled. something luminous. Astronomy. the brightness of a star in comparison with that of the sun: the luminosity of Sirius expressed as 23 indicates an intrinsic brightness 23 times as great as that of the sun.