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Luminosity is the energy of all types is radiated by an object in all directions per sec. So it measured in ergs per sec or Joule per sec (= Watt).
Luminosity can be measured in more than one unit.
- Candela per square metre
- Stilb
- Apostilb
- Lambert
- Foot-lambert
Each one is explained in the related links below.
Previous answer Candela per square meter or for illuminance.
What else can I help you with?
Why does the sun have a luminosity of 1?
It really depends on the units used. Sometimes the Sun is used as a comparison for the brightness of other stars, or even galaxies - in this case, the Sun's luminosity is arbitrarily defined as 1, and a star that is 10 times brighter will have luminosity 10, for example. However, if you use other units, for example watts, you get quite different numbers (3.846×1026 watts for the Sun, according to the Wikipedia).
What is a sentence with luminosity in it?
I was enthralled by the luminosity of the deep water jellyfish.
How many times brighter is Capella than the sun?
Rigel has a luminosity of 66,000 times greater than our Sun.However, in apparent magnitude (Brightness) it has a magnitude of 0.18 whereas the Sun is -26.73.
What is the luminosity of the star regulus?
In astronomy, Luminosity is the amount of energy a body radiates per unit time. The luminosity of stars is measured in two forms: apparent (counting visible light only) and bolometric (total radiant energy); a bolometer is an instrument that measures radiant energy over a wide band by absorption and measurement of heating. When not qualified, luminosity means bolometric luminosity, which is measured in the SI units watts, or in terms of solar luminosities, ; that is, how many times as much energy the object radiates than the Sun, whose luminosity is 3.846×1026 W. Luminosity is an intrinsic constant independent of distance, and is measured as absolute magnitude corresponding to apparent luminosity, or bolometric magnitude corresponding to bolometric luminosity. In contrast, apparent brightness is related to distance by an inverse square law. Visible brightness is usually measured by apparent magnitude, which is on a logarithmic scale. In measuring star brightnesses, visible luminosity (not total luminosity at all wave lengths), apparent magnitude (visible brightness), and distance are interrelated parameters. If you know two, you can determine the third. Since the sun's luminosity is the standard, comparing these parameters with the sun's apparent magnitude and distance is the easiest way to remember how to convert between them.
What is the luminosity class of the sun?
V
How is star luminosity measured?
A star's luminosity is measured according to the relevance to the sun. Basically for example, if a star is 8,300 degrees Celsius and has a luminosity of 0.001; the luminosity is compared to the sun.
Is the sun measured by watts?
It's luminosity is: 3.846×1026 Watts
Why does the sun have a luminosity of 1?
It really depends on the units used. Sometimes the Sun is used as a comparison for the brightness of other stars, or even galaxies - in this case, the Sun's luminosity is arbitrarily defined as 1, and a star that is 10 times brighter will have luminosity 10, for example. However, if you use other units, for example watts, you get quite different numbers (3.846×1026 watts for the Sun, according to the Wikipedia).
What is a sentence with luminosity in it?
I was enthralled by the luminosity of the deep water jellyfish.
How many times brighter is Capella than the sun?
Rigel has a luminosity of 66,000 times greater than our Sun.However, in apparent magnitude (Brightness) it has a magnitude of 0.18 whereas the Sun is -26.73.
What is the luminosity of the star regulus?
In astronomy, Luminosity is the amount of energy a body radiates per unit time. The luminosity of stars is measured in two forms: apparent (counting visible light only) and bolometric (total radiant energy); a bolometer is an instrument that measures radiant energy over a wide band by absorption and measurement of heating. When not qualified, luminosity means bolometric luminosity, which is measured in the SI units watts, or in terms of solar luminosities, ; that is, how many times as much energy the object radiates than the Sun, whose luminosity is 3.846×1026 W. Luminosity is an intrinsic constant independent of distance, and is measured as absolute magnitude corresponding to apparent luminosity, or bolometric magnitude corresponding to bolometric luminosity. In contrast, apparent brightness is related to distance by an inverse square law. Visible brightness is usually measured by apparent magnitude, which is on a logarithmic scale. In measuring star brightnesses, visible luminosity (not total luminosity at all wave lengths), apparent magnitude (visible brightness), and distance are interrelated parameters. If you know two, you can determine the third. Since the sun's luminosity is the standard, comparing these parameters with the sun's apparent magnitude and distance is the easiest way to remember how to convert between them.
What is the luminosity class of the sun?
V
What is the luminosity of the sun?
The luminosity of the Sun is approximately 3.8 x 10^26 watts, which means it is emitting this amount of energy every second. This energy output is generated through nuclear fusion reactions in the Sun's core.
What is the luminosity of Deneb?
Deneb has a luminosity (apparent magnitude) of 1.25. However, in bolometric luminosity (solar units) Deneb is 54,000, whereas our Sun is 1.
What is a Polaris star luminosity?
The main star in the Polaris system has a luminosity which is 2500 times that of the Sun.
What is the brightness of the sun?
The Sun has a brightness or apparent magnitude [See related question] of -26.74 (yes negative).
Does Rigel have a higher luminosity and a lower temperature the the sun?
No.
