# Brewster reflection

> Glass at one special angle: the reflection is polarized, and an analyzer can kill the glare.

![Brewster reflection](https://www.loomrume.com/optics/stills/brewster-reflection.png)

**David Brewster** · 1815 — Brewster’s law

At one angle on glass, tan θB = n, the reflected beam is fully s-polarized and the p-component goes into the glass. Brewster published that in 1815, the same decade as the [Kaleidoscope](https://www.loomrume.com/examples/kaleidoscope.md).

Photographers still use it: a polarizer on the lens can kill glare off water or a window because that glare is already polarized. On this bench the analyzer eats the p-reflection and leaves the s. Tilt the glass and the null walks.

## Sources

- [Brewster’s angle](https://en.wikipedia.org/wiki/Brewster%27s_angle)
- [David Brewster](https://en.wikipedia.org/wiki/David_Brewster)

## Links

- [HTML](https://www.loomrume.com/examples/brewster-reflection)
- [Open in Studio](https://www.loomrume.com/experiments/new?template=brewster-reflection)
- [llms.txt](https://www.loomrume.com/llms.txt)