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

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

Fill in the required fields to see your result.

Optics

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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Key differences

	Critical Angle Calculator	Brewster's Angle Calculator
Category	Optics	Optics
Inputs required	2	2
Result	Critical Angle (°)	Brewster's Angle (°)
What it does	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.	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.