Brewster's Angle Calculator
Free calculate brewster's angle for light polarization at dielectric interfaces where reflected light is completely polarized.
Input Parameters
Usually air = 1.0
Common: glass ≈ 1.5, water ≈ 1.33
Results
Enter refractive indices to calculate Brewster's angle
Brewster's Law
Formula
tan(θB) = n₂ / n₁
Where θB is Brewster's angle
Key Points
- • At Brewster's angle, reflected light is 100% polarized
- • Reflected and refracted rays are perpendicular
- • Used in polarizing filters and laser optics
- • Only p-polarized light is reflected