What is the Snell’s Law Calculator?

The Snell’s Law Calculator allows you to determine the refracted angle of light as it passes from one medium to another using Snell’s Law: n1sin⁡θ1=n2sin⁡θ2n_1 \sin \theta_1 = n_2 \sin \theta_2n1​sinθ1​=n2​sinθ2​. By entering the refractive indices of the two media and the incident angle, the tool calculates the angle of refraction or indicates if total internal reflection occurs. This is useful for students, optics researchers, and anyone working with light refraction problems.

How to Use:

1. Enter Refractive Index of Medium 1 (n₁): Input the refractive index of the first medium.
2. Enter Incident Angle (θ₁): Input the angle at which light strikes the boundary in degrees (0°–90°).
3. Enter Refractive Index of Medium 2 (n₂): Input the refractive index of the second medium.
4. Click “Calculate”: The calculator determines the refracted angle in the second medium.
5. Review the Result: The result shows the refracted angle or notifies if total internal reflection occurs.