Luminosity Calculator


Calculating luminosity is essential in various fields such as astronomy, photography, and lighting design. Understanding how luminosity is calculated helps in determining the brightness or intensity of light sources. In this article, we’ll delve into the concept of luminosity calculation and provide a practical example along with a working calculator.

How to Use

To use the luminosity calculator, simply input the required values and click the “Calculate” button to obtain the result.


The formula for calculating luminosity (L) is:


  • R is the radius of the object (in meters).
  • σ is the Stefan-Boltzmann constant (5.67×10−8 W/m²K⁴).
  • T is the temperature of the object (in Kelvin).

Example Solve

Using the provided formula:


What is luminosity?

Luminosity is the total amount of energy emitted by an object, such as a star, per unit of time.

Why is luminosity important?

Luminosity helps astronomers understand the characteristics and behaviors of celestial objects, such as stars, galaxies, and quasars. It also plays a crucial role in fields like photography and lighting design.


Calculating luminosity is crucial in various scientific and practical applications. By understanding the formula and using tools like the provided calculator, one can accurately determine the brightness or intensity of light sources.

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