Intensidade Luminosa c/ Distância
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
Lei do inverso do quadrado
About this calculator
The Intensity of Light with Distance calculator is a useful tool for calculating light intensity at different distances. It is based on the Inverse Square Law, which states that light intensity is inversely proportional to the square of the distance.
The formula used is I₂ = I₁(r₁/r₂)², where I₁ and I₂ are the light intensities at distances r₁ and r₂, respectively. This formula allows calculating the light intensity at a specific distance, provided the light intensity at another distance is known.
The calculator is useful in various situations, such as in the design of lighting for environments, in evaluating the efficiency of light sources, and in analyzing optical phenomena. Additionally, it is essential to be careful when using the calculator, as the Inverse Square Law is only valid for point sources of light and does not apply to extended sources.
It is crucial to understand that light intensity is a physical quantity that depends on the amount of luminous energy that falls on a surface per unit time and area. Therefore, the calculator should be used based on precise and reliable data to obtain accurate results.
Frequently asked questions
What is the Inverse Square Law?
The Inverse Square Law is a physical law that states that light intensity is inversely proportional to the square of the distance. This means that as the distance increases, the light intensity decreases.
What are the applications of the Intensity of Light with Distance calculator?
The calculator is useful in various situations, such as in the design of lighting for environments, in evaluating the efficiency of light sources, and in analyzing optical phenomena.
Why is it important to be careful when using the calculator?
It is essential to be careful when using the calculator because the Inverse Square Law is only valid for point sources of light and does not apply to extended sources. Additionally, it is crucial to use precise and reliable data to obtain accurate results.
What is light intensity?
Light intensity is a physical quantity that depends on the amount of luminous energy that falls on a surface per unit time and area.
How to use the Intensity of Light with Distance calculator?
To use the calculator, simply enter the known values of light intensity and distance, and the calculator will calculate the light intensity at the desired distance.