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The hottest stars have surface temperatures approaching 30000 K The coolest stars have temperatures of approximately 3000 K Based upon temperature alone how much more luminous are the hottest star?
Masterbaby721
They are 27,000 k more luminous then the coolest stars. Based upon temperatures then lesser star are unseen with extended lenses.
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∙ 9y ago
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What types of stars have very high surface temperatures but are not very luminous?
white dwarfs
Are main sequence stars all alike in their luminosity and temperature?
No. Main sequence stars vary greatly in both temperature and luminosity. The least massive stars, red dwarfs, can have temperatures as low as 2,300 Kelvin and luminosity as low as 0.015% that of the sun. The most massive stars, which are blue in color can have temperatures as high as 50,000 Kelvin and may be hundreds of thousands times more luminous than the sun.
How can a cool star be more luminous than a hot star?
Luminosity is related to temperature and distance.A cool and thus less luminous star would be brighter than a more luminous star at a greater distance.Our Sun is a relatively cool star in comparison to say Rigel, but because it is closer it appears more luminous and brighter.
Is a volcano erupting luminous or non luminous?
It is luminous
Is the earth luminous or non-luminous?
The earth is Non-luminous.
What types of stars have very high surface temperatures but are not very luminous?
white dwarfs
Name two objects which are non-luminous at room temperature but can be made luminous when heated?
-- the filament in an incandescent light bulb-- the coils in a bread toaster
Are main sequence stars all alike in their luminosity and temperature?
No. Main sequence stars vary greatly in both temperature and luminosity. The least massive stars, red dwarfs, can have temperatures as low as 2,300 Kelvin and luminosity as low as 0.015% that of the sun. The most massive stars, which are blue in color can have temperatures as high as 50,000 Kelvin and may be hundreds of thousands times more luminous than the sun.
How can a cool star be more luminous than a hot star?
Luminosity is related to temperature and distance.A cool and thus less luminous star would be brighter than a more luminous star at a greater distance.Our Sun is a relatively cool star in comparison to say Rigel, but because it is closer it appears more luminous and brighter.
Should a luminous or non luminous Bunsen flame be used for heating in the laboratory and why?
Non-luminous flame should be used for heating in the laboratory because the flame is steady and produce little or no soot.Non-luminous flame is very hot thus, it is recommendable to use for laboratory purposes.Luminous flame is unsteady while non-luminous flame is steady.Another reason of using non-luminous flame because the flame of non-luminous is blue, and not visible unlike the luminous flame which is yellow in colour and visible.
Which portion of the luminous flame is the coolest?
For a Bunsen burner the lowest temperature is in the extreme lower part of the flame.
Is the temperature of a luminous flame greater ot less than that of a nonluminous flame?
The yellow color in a luminous flame is basically the black-body emission from hot particles of soot in the flame. they are hot, and they glow like the filament of a light bulb. In a blue flame, there are no particles of soot to give that incandescent radiation. Instead, the main color you see is blue emission from the high-energy C2 molecule.
Is a volcano erupting luminous or non luminous?
It is luminous
Is sooty flame a luminous or non luminous?
luminous
Is the earth luminous or non-luminous?
The earth is Non-luminous.
Is table luminous or non luminous?
It's non-luminous
Are glow in the dark objects luminous or illuminated?
Luminous.
