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## Luminosity

en.wikipedia.org/wiki/Luminosity

. Point source S is radiating light equally in all directions. The amount passing through an area A varies with the distance ...

## Formulas - Luminosity - Astronomy Online

astronomyonline.org/Science/Luminosity.asp

Science - Formulas. ... Physics - Formulas - Luminosity ... if we know distance and brightness of a star, we can determine its Luminosity (or actual brightness):.

## Luminosity of Stars - Australia Telescope National Facility

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

How is this equation derived? It is simply an application of the luminosity ratio relationship (4.7).

## Luminosity - Hertzsprung-Russell Diagram - NAAP - UNL Astronomy

astro.unl.edu/naap/hr/hr_background2.html

Luminosity is the total energy that a star produces in one second. It depends on both the radius of the star and on its surface temperature. One can calculate ...

## Luminosity Formula - UNL Astronomy

astro.unl.edu/classaction/questions/stellarprops2/ca_stellarprops2_luminosity.html

A star with a radius like that of the sun and a surface temperature twice that of the sun, will have luminosity _____ times as great as the sun's luminosity.

## What is the Formula for Determining the luminosity of a star ...

Feb 10, 2010 ... Best Answer: The formula for the Luminosity L = Area * Energy Flux = 4pi R^2 * sigma T^4, where R is the radius and T the temperature.

## Luminosity and Apparent Brightness | Astronomy 801: Planets, Stars ...

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

The difference between luminosity and apparent brightness depends on distance . ... Thus, the equation for the apparent brightness of a light source is given by ...

## Luminosity of Stars: Radius & Surface Temperature

www.idialstars.com/april2013.htm

The luminosity of a star depends upon radius and surface temperature. ... In the equation below L = luminosity and R = radius. Let's say the radius of the star is 5  ...

## Finding the Radius of a Star - SkyServer

The luminosity of a star is given by the equation. L = 4pR<sup>2</sup>s T<sup>4</sup>,. Where L is the luminosity in Watts, R is the radius in meters, s is the Stefan-Boltzmann constant

Dec 26, 2012 ... Luminosity of a Star. ... Introductory Astronomy: Luminosity, Temperature, and Surface Area - Duration: 16:15. P.E. Robinson 3,999 views. 16:15.
Popular Q&A
Q: How would i use the luminosity formula with this?
A: Most guys ( gals) do the mistake of calculating in absolute quantities when only ratios suffice. Don't convert every quantity to absolute quantiies; do the comp... Read More »