How to use the brewster's angle calculator
Find the angle that fully polarizes reflected light. Enter index of medium 1, index of medium 2 in the fields above; the brewster angle is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- n1 — Index of medium 1
- n2 — Index of medium 2
Worked example
With index of medium 1 = 1, index of medium 2 = Water, the calculator gives brewster angle ≈ 53.12323 °.
Frequently asked questions
What is the formula for the brewster's angle calculation?
Brewster angle (°) = atan(n2 / n1). Here n1 is index of medium 1, n2 is index of medium 2.
What inputs do I need for the brewster's angle calculator?
You need index of medium 1, index of medium 2. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.