ClarityHow to use this tool
- Enter incident polarized intensity, angle between polarization axes.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
The method, explained
Transmitted intensity = incident intensity × cos²(angle).
Using incident polarized intensity = 100 W/m², angle between polarization axes = 45 degrees, the result is 50 W/m². Change these example inputs to match your task; use the method above to check each step.
Understanding your result
The input is already linearly polarized. For unpolarized light through a first ideal polarizer, first halve its intensity.
What to keep in mind
The input is already linearly polarized. For unpolarized light through a first ideal polarizer, first halve its intensity. An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.
Common questions
How do I use this malus law calculator?
Estimate transmitted intensity through an ideal analyzer for linearly polarized light. Enter incident polarized intensity in W/m², angle between polarization axes in degrees. The starting example is editable; use values for the same system or project.
Which assumptions affect this result?
The input is already linearly polarized. For unpolarized light through a first ideal polarizer, first halve its intensity.
Methodology maintained by ClarityKit. How these tools are built and checked.