Polarization & Malus Law Calculator
Calculate light intensity through polarizers using Malus law and Brewster angle
About this calculator
This Polarization & Malus Law Calculator helps you determine the intensity of light passing through polarizing filters and calculate Brewster angles for different materials. Malus law describes how polarized light intensity changes when passed through a polarizer at various angles. This tool is essential for students, researchers, and professionals working with optical systems, photography, LCD displays, and laser applications where controlling light polarization is crucial for optimal performance.
How to use
Enter the initial light intensity and the angle between the polarizer and light's polarization direction. For Brewster angle calculations, input the refractive indices of both materials. Click calculate to get the transmitted light intensity according to Malus law or the critical angle for complete polarization.
Frequently asked questions
What is Malus law?
Malus law states that transmitted light intensity equals the initial intensity multiplied by the cosine squared of the angle between polarizers.
What is the Brewster angle?
The Brewster angle is the incident angle at which reflected light becomes completely polarized, depending on the materials' refractive indices.
When is light intensity maximum through polarizers?
Light intensity is maximum when polarizers are aligned parallel (0° angle), allowing all polarized light to pass through unobstructed.