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Snell's Law Refraction Calculator

Calculate the refraction angle when light passes between two media using Snell's Law. Use it in optics coursework, lens design, or to find the critical angle for total internal reflection.

Incident Angle (degrees)

First Medium Refractive Index

Second Medium Refractive Index

Fill in the required fields to see your result.

Optics

Fiber Optic Parameters Calculator

Compute the numerical aperture, acceptance cone half-angle, or critical angle of an optical fiber from its core and cladding refractive indices. Used by fiber installers, photonics students, and optical engineers.

Core Refractive Index

Cladding Refractive Index

External Medium Index

Calculate

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Key differences

	Snell's Law Refraction Calculator	Fiber Optic Parameters Calculator
Category	Optics	Optics
Inputs required	3	4
Result	Refracted Angle (degrees)	Result
What it does	Calculate the refraction angle when light passes between two media using Snell's Law. Use it in optics coursework, lens design, or to find the critical angle for total internal reflection.	Compute the numerical aperture, acceptance cone half-angle, or critical angle of an optical fiber from its core and cladding refractive indices. Used by fiber installers, photonics students, and optical engineers.