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Luminous Meaning and Definition in Dictionary

Definitions from Wordnet 2.0

  • softly bright or radiant; "a house aglow with lights"; "glowing embers"; "lambent tongues of flame"; "the lucent moon"; "a sky luminous with stars"

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Luminous Meaning and Definition in Wikipedia

Luminosity is a measure of brightness. Brightness is how much light is given off.

In astronomy, the total amount of energy emitted by a star or other astronomical object is its luminosity. It is measured in joules per second, which are watts. A watt is one unit of power. Just as a light bulb is measured in watts, so too is the Sun. The sun gives off 3.846×1026 W. This number is known as 1 sol, the symbol for which is .

There are other ways to describe luminosity. The most common is apparent magnitude, which is how bright an object looks to an observer on Earth. Naturally this only applies to light, that is, visible wavelengths. Apparent magnitude is contrasted with absolute magnitude, which is an object's intrinsic brightness at visible wavelengths, irrespective of distance.

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Luminous Sample Sentences in News

  • Monster Black Hole Is the Largest and Brightest Ever Found
    Astronomers have discovered the largest and most luminous black hole ever seen — an ancient monster with a mass about 12 billion times that of the sun — that dates back to when the universe was less than 1 billion years old. Supermassive black holes are thought to lurk in the hearts of most, if not all, large galaxies. The largest black holes found so far in t Read more on this news related to 'Luminous'
  • Toshiba Launches High Luminous Efficacy Power White LEDs
    Toshiba Corporation’s Semiconductor & Storage Products Company today announced the launch of a new series of high luminous efficacy power white LEDs that achieves an industry-leading[1] luminous flux surpassing 160lm[2]. Read more on this news related to 'Luminous'
  • Black hole much bigger than Sun found: Scientists
    Astronomers have found the largest black hole till date — as big as 12 billion times bigger than the sun and 420 trillion times more luminous than our sun. Read more on this news related to 'Luminous'

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