# 全反射可视化 - Total Internal Reflection

全反射交互式模拟，展示临界角、折射和反射在介质界面的现象

> 标准页面: https://elysiatools.com/zh/visualizations/total-internal-reflection

- **分类:** Physics

## 概述

Interactive simulation of total internal reflection (TIR) - explore critical angle calculation θc = arcsin(n₂/n₁), Snell's law n₁sin(θ₁) = n₂sin(θ₂), refraction vs reflection at medium interfaces, and optical fiber applications. Features dual canvas visualization: main ray tracing view showing incident ray (red), refracted ray (blue), reflected ray (green), critical angle marker (yellow), normal line, angle arcs, and TIR indicator; optical fiber application demo with animated light pulse propagation. Adjustable parameters: refractive indices n₁ (0.5-3.0, default 1.5 glass) and n₂ (0.5-3.0, default 1.0 air), incident angle θᵢ (0-89°), and display toggles for normal line, angle arcs, critical angle marker, fiber animation. Real-time statistics: incident angle, critical angle, refracted angle, TIR status (YES/NO). Four preset scenarios: Glass→Air (n₁=1.5, n₂=1.0), Water→Air (n₁=1.33, n₂=1.0), Diamond→Air (n₁=2.42, n₂=1.0), No TIR case (n₁ < n₂). Physics formulas: Snell's law, critical angle calculation, TIR condition θᵢ > θ꜀ (when n₁ > n₂), reflection law θᵣ = θᵢ. Comprehensive educational content explaining TIR phenomenon, critical angle significance, three required conditions (n₁ > n₂, θᵢ > θ꜀, smooth surface), practical applications (optical fibers, prisms, diamond brilliance, mirages), and fiber optic communication principles. Multi-language support (zh, en, de, fr, es, ru, pt).

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