Kirchhoff Radiação
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
α=ε
About this calculator
The Kirchhoff Radiation Calculator is a useful tool for students and professionals in the field of physics, especially in courses of Applied Physics. It helps to calculate the ratio of absorption and emission of radiation by a material based on the relationship between the properties ε_λ and α_λ.
The formula used by the calculator is simple and direct: α=ε. This means that absorption of radiation is equal to emission. However, it is essential to note that this relationship only holds under certain conditions, such as temperature and material concentration.
This calculator is useful in practical cases, such as when you need to calculate the amount of radiation absorbed by a material over a given time period. In addition, it is essential to be careful when selecting the material and measurement conditions, as this can affect the calculator's results.
Before using the calculator, it is essential to remember that the Kirchhoff law is not valid in all cases, such as high-pressure or temperature situations. Additionally, it is essential to have knowledge of the material properties and measurement conditions to obtain accurate results.
Frequently asked questions
What is the Kirchhoff law?
The Kirchhoff law is a mathematical relationship that describes the absorption and emission of radiation by a material. It is expressed by the formula α=ε.
When is the Kirchhoff law valid?
The Kirchhoff law is valid under specific temperature and material concentration conditions.
Why is the Kirchhoff law not valid in all cases?
The Kirchhoff law is not valid in high-pressure or temperature situations, among other factors.
How to choose the correct material for the calculator?
It is essential to choose a material with known properties and that are suitable for the measurement conditions.
What is important to remember when using the calculator?
It is essential to remember that the Kirchhoff law is not valid in all cases and that it is crucial to have knowledge of the material properties and measurement conditions.