Snell’s Law Calculator – Refraction & Refractive Index Tool Snell’s Law Calculator is a powerful and easy-to-use physics calculator for solving light refraction problems instantly. Calculate the angle of incidence, angle of refraction, or refractive index with a real-time visual ray diagram and automatic formula updates. Perfect for physics students, optics learners, teachers, and engineers. This calculator makes refraction calculations simple and precise. Calculate Instantly Solve for: Angle of Incidence (θ₁) Angle of Refraction (θ₂) Refractive Index of Medium 1 (n₁) Refractive Index of Medium 2 (n₂) Based on the Snell’s Law formula: n₁ · sin(θ₁) = n₂ · sin(θ₂) All calculations update in real time as you adjust angles or refractive indices. Interactive Visual Ray Diagram - Live incident and refracted ray visualization - Automatic angle display on diagram - Clear interface between two media - See how light bends when passing from air to water, glass, acrylic, diamond, and more Perfect for understanding optics and wave behavior visually. Built-in Material Presets Quickly select common media: - Air - Water - Ice - Glass (Crown) - Glass (Flint) - Acrylic - Diamond Or manually enter custom refractive index values for advanced physics problems. Designed for Precision - Real-time calculation - Supports up to 16 decimal places - Adjustable sliders for fast input - Manual numeric entry supported - Degree/Radian unit display - Copy results to other apps - Formula shown for reference Optimized for iPhone & iPad - Clean, modern iOS design - Lightweight and fast - Works seamlessly on both iPhone and iPad - Ad-free experience - Privacy-focused — no unnecessary data collection Perfect For - High school physics students - College optics courses - Engineering calculations - Homework and exam preparation - Quick refractive index verification Understand how light behaves at the boundary between two media and visualize refraction instantly. Download Snell’s Law Calculator today and solve optics problems faster and more accurately. Visit nitrio.com for more powerful calculator apps for iOS.