Free Snell's Law Calculator
Calculate the angle of refraction using Snell's law: n1*sin(theta1) = n2*sin(theta2).
°
Angle of Refraction
19.47 °
Angle of Refraction vs Refractive Index 1
Snell's Law
Snell's law describes how light bends when passing between media with different refractive indices.
Formula
n1 * sin(theta1) = n2 * sin(theta2)
Light bends toward the normal when entering a denser medium (higher n) and away from the normal when entering a less dense medium.
Example Calculation
Light enters glass (n=1.5) from air (n=1) at 30 degrees.
- 01n1*sin(theta1) = n2*sin(theta2)
- 021*sin(30°) = 1.5*sin(theta2)
- 030.5 = 1.5*sin(theta2)
- 04sin(theta2) = 0.333
- 05theta2 = 19.47°
Frequently Asked Questions
Learn More
Understanding Newton's Laws of Motion
A comprehensive guide to Newton's three laws of motion. Learn about inertia, force and acceleration, action-reaction pairs, and how these principles govern everyday physics.