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How does the luminosity of a blackbody vary with its surface temperature?
Both the absorption and the luminosity of a blackbody in equilibrium increase in magnitude with increasing temperature, and the spectral distribution of the luminosity increases in frequency (decreases in wavelength).
How does the diameter and luminosity of a main sequence star change when it becomes a giant or a supergiant?
In that case, both the star's diameter and its luminosity greatly increase.
What are the difrences of a with dwarf and the giant stars?
Through a comparison of solar luminosity and temperature seen with the H-R diagram. On this diagram, stars sharing the same temperature but different luminosities show measurable differences in radius as well as mass. So if two stars both have the same visible surface temperature but one is more luminous, it has to be larger. This is further explained by Stefan Boltzmann's law,L=(4πR^2 x sigma(constant) x T^4)A Star with the the same surface temperature with larger surface area results in more Luminosity.
Why are most visual binary stars of low luminosity?
Most visual binary stars are of low luminosity because they are often close together and both stars have similar masses, resulting in them being fainter than single stars of the same age. Additionally, the companion stars in these binary systems may not be large or hot enough to emit high levels of light.
Does the potential or kinetic energy depend on mass?
These are both direct relationships, so yes.KE = mv2PE = mghAs you see, both depend on mass. ( unless they are set to equal )
Why does the luminosity of the star depend on both its radius and its temperature?
The bigger the star's radius, the greater its surface area which emits the light. The bigger the temperature, the more luminous is the light the star is emitting.
What if the star has a bigger surface area but a smaller temperature how would that affect the luminosity?
As temperature decreases, luminosity will also decrease As radius increases (and with it surface area, but radius is a much easier to work with if you're trying to compare stars so we usually say radius) luminosity will also increase. If both are happening at the same time, it is possible that the luminosity of the star will remain more or less constant. Often one change will dominate the other, such as when a star goes through the red giant phase when the increase in radius has a far greater effect than the drop in temperature, and the star becomes more luminous.
How does the luminosity of a blackbody vary with its surface temperature?
Both the absorption and the luminosity of a blackbody in equilibrium increase in magnitude with increasing temperature, and the spectral distribution of the luminosity increases in frequency (decreases in wavelength).
What happens to the surface temperature and luminosity when gravity first assembles a protostar from a collapsing cloud?
As gravity collapses the cloud to form a protostar, the temperature and luminosity both increase. The increase in temperature is due to the compression of material, causing the protostar to heat up as energy is released. The increase in luminosity is a result of the protostar radiating this energy.
Which two stars have the most similar luminosity and surface temperature?
Sirius A and Procyon A are two stars that have similar luminosity and surface temperature. They are both main-sequence stars and are relatively close to each other in terms of these characteristics.
If a star has a large luminosity and also a low surface temperature then it must have?
If a star has a large luminosity and a low surface temperature, it must have a large surface area to compensate for the low temperature and still emit a high amount of energy. This would make the star a red supergiant, a type of star that is both luminous and cool at the same time.
What is the surface area of disc for both side of disc surface?
Pi*6 * * * * * Independent of the radius? Makes no difference if the disc is twice as wide? I think not! It is actually 2*pi*r2 where r is the radius of the disc.
What effects the cylinder more doubling the radius or doubling the height?
They both have the same effect on the surface area of the pipe, but the radius has more effect on its volume/capacity.
How are the surface area formulas of cones and cylinders similar?
They both depend on circumference not perimeter.
What is the surface area of a cylinder a radius of 7 inches and a height of 14 inches?
615.7522 square inches for 1 surface but it will be 1231.5044 for both surfaces
How does the diameter and luminosity of a main sequence star change when it becomes a giant or a supergiant?
In that case, both the star's diameter and its luminosity greatly increase.
What is the new volume of a cylinder if the height and radius are doubled?
If the radius and height of a cylinder are both doubled, then its surface area becomes 4 times what it was originally, and its volume becomes 8 times as much.
