Brewsters Angle Calculator

How to Use the Calculator

1. Enter the wavelength of the light in nanometers (nm). This is typically in the visible spectrum range of 400-700 nm.
2. Enter the refractive index of the second medium (e.g., glass, water). The refractive index of air is approximately 1.
3. Click the "Calculate" button to compute the Brewster's Angle.
4. The result will be displayed in degrees.

Working Principle

Brewster's Angle, also known as the polarization angle, is the angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface without reflection. When light hits a surface at Brewster's Angle, the reflected light is completely polarized perpendicular to the plane of incidence.

The formula to calculate Brewster's Angle is:

tan(θB) = n2 / n1

Where θB is the Brewster's Angle, n1 is the refractive index of the first medium (usually air, n1 ≈ 1), and n2 is the refractive index of the second medium.