Physics · Optics & Photonics

Polarizer Transmission Calculator

Calculate polarizer transmission from explicit physical quantities and a visible governing equation.

Physics · Optics & Photonics

Enter the physical quantities

Private in-browser calculation · idealized model and explicit units

Polarizer TransmissionI = I₀cos²θ

1EnterProvide the known values
2CalculateResults update automatically
3VerifyReview the details and units

Try an example

Initial intensity (W/m²)

Polarizer angle difference (°)

Use the stated units and retain signs where direction matters. The result follows the displayed idealized equation.

Polarizer Transmission result

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Enter valid values to see the result.

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Understand the physical model

What this calculator is for

Use this calculator to evaluate the stated polarizer transmission relationship without hidden constants or undocumented presets. The schematic and governing relationship appear before the examples and fields so the role of every quantity stays visible.

The governing relationship

I = I₀cos²θ

Model boundary

This is an idealized physical model, not a safety, equipment-selection, clinical, radiation-protection or professional design decision.

Quick guide

How to use this calculator

Choose the complete example closest to the physical situation.
Replace every preset with compatible values while retaining direction signs and stated units.
Check the detailed labels, equation and model boundary before relying on the result.

Calculation method

Transparent physics calculation

I = I₀cos²θ

Only the displayed quantities are used; no hidden material, environmental or safety factor is introduced.

Worked example

Three complete starting scenarios

Load a complete aligned example.

I = I₀cos²θ

Supported inputs

Precision and limits

Idealized model

This is an idealized physical model, not a safety, equipment-selection, clinical, radiation-protection or professional design decision.

Units and frames

Keep all inputs in the displayed units and use one consistent sign convention and reference frame.

Experimental uncertainty

Measured inputs carry uncertainty that may materially affect the result even when the arithmetic is exact.

Privacy

Entered physical quantities remain in this browser.