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Both calculators run independently — change the inputs on either side to compare results.

Brewster's Angle Calculator

Calculate Brewster's angle — the incidence angle at which reflected light is perfectly polarized — given two media's refractive indices. Essential for optics design, laser engineering, and polarization experiments.

First Medium Refractive Index

Second Medium Refractive Index

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Optics

Critical Angle Calculator

Calculate the critical angle beyond which light undergoes total internal reflection at the boundary between a denser and a rarer medium. Essential for fiber optics, prism design, and understanding optical phenomena.

Denser Medium Refractive Index

Rarer Medium Refractive Index

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Key differences

	Brewster's Angle Calculator	Critical Angle Calculator
Category	Optics	Optics
Inputs required	2	2
Result	Brewster's Angle (°)	Critical Angle (°)
What it does	Calculate Brewster's angle — the incidence angle at which reflected light is perfectly polarized — given two media's refractive indices. Essential for optics design, laser engineering, and polarization experiments.	Calculate the critical angle beyond which light undergoes total internal reflection at the boundary between a denser and a rarer medium. Essential for fiber optics, prism design, and understanding optical phenomena.