# Stefans Boltzmann Law: Find Star Luminosity

• shugar37
In summary, Stefan's Boltzmann Law is a physical law that relates the total energy emitted per unit surface area of a black body to its temperature. It can be used to find the luminosity of a star by using its surface temperature and radius, but it is most accurate for stars that are considered to be black bodies. However, other factors such as composition, distance, and surrounding objects can affect the accuracy of using this law to determine star luminosity.
shugar37
how do i find the luminosity of a star

You measure it with a camera and telescope, or you can calculate it knowing it's temperature.

Check out the following page:

http://exploringuniverse.com/star/what-is-star.php"

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## 1. What is Stefan's Boltzmann Law?

Stefan's Boltzmann Law is a physical law that describes the relationship between the total energy emitted per unit surface area of a black body and its temperature. It states that the energy emitted is proportional to the fourth power of the black body's absolute temperature.

## 2. How is Stefan's Boltzmann Law used to find star luminosity?

Stefan's Boltzmann Law can be used to find the luminosity of a star by using the star's surface temperature and radius. The law states that the luminosity is equal to the product of the Stefan-Boltzmann constant, the surface area of the star, and the fourth power of the star's temperature.

## 3. Can Stefan's Boltzmann Law be used for all types of stars?

Yes, Stefan's Boltzmann Law can be used for all types of stars, as long as they are considered black bodies. A black body is an idealized object that absorbs all radiation incident upon it, and therefore, emits radiation according to the Stefan-Boltzmann Law.

## 4. How accurate is Stefan's Boltzmann Law in determining star luminosity?

Stefan's Boltzmann Law is considered to be a very accurate method for determining star luminosity. However, it does not take into account factors such as the composition and opacity of a star's atmosphere, which can affect the accuracy of the calculated luminosity.

## 5. Are there any other factors that can affect the accuracy of using Stefan's Boltzmann Law?

Yes, there are other factors that can affect the accuracy of using Stefan's Boltzmann Law, such as the distance of the star from Earth, as well as the presence of any surrounding objects that may affect the star's radiation. These factors should be taken into consideration when using the law to calculate star luminosity.

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