what factor affects the luminosity of a star ?

Description

https://openstax.org › books › astronomy-2e › pages › 17-1-the-brightness-of-stars

https://openstax.org › books › astronomy-2e › pages › 17-1-the-brightness-of-stars
17.1 The Brightness of Stars – Astronomy 2e | OpenStax
If m1 and m2 are the magnitudes of two stars, then we can calculate the ratio of their brightness ( b 2 b 1) using this equation: m 1 − m 2 = 2.5 log ( b 2 b 1) or b 2 b 1 = 2.5 m 1 − m 2. Here is another way to write this equation: b 2 b 1 = ( 100 0.2) m 1 − m 2. Let’s do a real example, just to show how this works.

https://byjus.com › physics › luminosity

https://byjus.com › physics › luminosity
Luminosity – Definition, Factors, Theory, Formula, Example – BYJU’S
Luminosity generally depends upon two factors: The size of the star: The larger a star is, the more energy it puts out, and the more luminous it is. The temperature of the star: If two stars are of the same size but have different temperatures, then the star with a higher temperature will be more luminous than the with lower temperatures.

https://www.space.com › 21640-star-luminosity-and-magnitude.html

https://www.space.com › 21640-star-luminosity-and-magnitude.html
Luminosity and magnitude explained | Space
Luminosity and magnitude explained. By Elizabeth Howell. published 11 October 2017. This wide-field view of the sky around the bright star Alpha Centauri was created from photographic images …

https://science.howstuffworks.com › star3.htm

https://science.howstuffworks.com › star3.htm
Brightness, Luminosity and Radius – How Stars Work – HowStuffWorks
If they know the star’s brightness and the distance to the star, they can calculate the star’s luminosity: [luminosity = brightness x 12.57 x (distance)2]. Luminosity is also related to a star’s size. The larger a star is, the more energy it puts out and the more luminous it is. You can see this on the charcoal grill, too.

https://phys.libretexts.org › Bookshelves › Astronomy__Cosmology › Astronomy_1e_(OpenStax) › 17:_Analyzing_Starlight › 17.01:_The_Brightness_of_Stars

https://phys.libretexts.org › Bookshelves › Astronomy__Cosmology › Astronomy_1e_(OpenStax) › 17:_Analyzing_Starlight › 17.01:_The_Brightness_of_Stars
17.1: The Brightness of Stars – Physics LibreTexts
11 avr. 2022If m 1 and m 2 are the magnitudes of two stars, then we can calculate the ratio of their brightness (b2 b1) ( b 2 b 1) using this equation: m1 −m2 = 2.5 log(b2 b1) or b2 b1 = 2.5m1−m2 m 1 − m 2 = 2.5 log ( b 2 b 1) or b 2 b 1 = 2.5 m 1 − m 2. Let’s do a real example, just to show how this works.

https://academic.oup.com › bib › article › 22 › 5 › bbaa435 › 6120268

www.cosmos4kids.com › files › stars_luminos.html
Cosmos4Kids.com: Stars: Luminosity
There are some specific factors that affect luminosity. As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off. Temperature also affects a star’s luminosity. You don’t even need to look at a for this idea.

https://www.atnf.csiro.au › outreach › education › senior › astrophysics › photometry_luminosity.html

https://www.atnf.csiro.au › outreach › education › senior › astrophysics › photometry_luminosity.html
Luminosity of Stars – Australia Telescope National Facility
This becomes apparent when we plot stars on an HR diagram. Assuming stars are spherical then surface area is given by: surface area = 4π R2 (4.5) where R is the radius of the star. To calculate the total luminosity of a star we can combine equations 4.4 and 4.5 to give: L ≈ 4π R2σT4 (4.6) Using equation 4.6 all we need in order to …

https://www.e-education.psu.edu › astro801 › content › l4_p4.html

https://www.e-education.psu.edu › astro801 › content › l4_p4.html
Luminosity and Apparent Brightness | Astronomy 801: Planets, Stars …
The luminosity of a star, on the other hand, is the amount of light it emits from its surface. The difference between luminosity and apparent brightness depends on distance. … then the surface area of the larger sphere is larger by a factor of 4 = (2 2) This equation is not rendering properly due to an incompatible browser. See Technical …

https://courses.lumenlearning.com › suny-astronomy › chapter › the-brightness-of-stars

https://courses.lumenlearning.com › suny-astronomy › chapter › the-brightness-of-stars
The Brightness of Stars | Astronomy – Lumen Learning
Glossary. apparent brightness: a measure of the amount of light received by Earth from a star or other object—that is, how bright an object appears in the sky, as contrasted with its luminosity. luminosity: the rate at which a star or other object emits electromagnetic energy into space; the total power output of an object. magnitude: an …

https://www.sciencebuddies.org › science-fair-projects › project-ideas › Astro_p034 › astronomy › how-does-light-intensity-change-with-distance

https://www.sciencebuddies.org › science-fair-projects › project-ideas › Astro_p034 › astronomy › how-does-light-intensity-change-with-distance
Determine How Distance Affects Brightness As In Astronomy | Science Project
To find out just how far away a star is, scientists first had to figure out how the light intensity of a point source of light, like a star, changes with distance.Light intensity is a measure of how much light falls on a certain area, like one square meter. Scientists experimented and predicted that the relationship between intensity and distance would follow an inverse-square law. lesoutrali bot