Relativity Simulator vs 晶体光学实验室

Relativity Simulator is an interactive relativity toolkit built strictly on the axiomatic foundations of modern physics. There is no "hard sci-fi" here — every result traces back to the Lorentz transformation of special relativity or the Einstein field equations of general relativity, and is verified against numerical truth fixtures. 【Real physics, not imagination】 · 20 interactive modules covering core effects from special relativity to black holes, gravitational waves, and curved spacetime; · Each module ships with precise charts, adjustable parameters, and a "Theory Card" with a fully visible derivation chain; · All demo numbers are recomputed locally on your device from real CODATA constants — nothing is fabricated. 【Phenomena you can verify yourself】 · Gravitational time dilation: why clocks run faster up high — ~80 ns/day faster atop Everest, ~38 µs/day faster on GPS satellites; · Twin paradox: fly to 4.22 light-years at 0.8c and the Earth twin ages 10.5 years while the traveler ages only 6.3; · Tidal disruption: why you get stretched into "spaghetti" falling into a black hole — small holes tear you outside the horizon, supermassive ones only after you cross it; · Plus light bending, gravitational lensing, the Schwarzschild horizon, frame dragging, and mass–energy equivalence E=mc². 【Built for learning and teaching】 · Volume-based progression: kinematics → gravitational field → black holes → cosmology → applications; · Bilingual (zh/en) system notes ship with every effect: derivation, physical quantities, and references; · Chinese / English UI follows your system language. 【Privacy first】 The app collects, stores, and transmits no personal data, embeds no third-party SDKs, and runs every computation locally on your device. Whether you are studying, teaching, or simply curious, Relativity Simulator lets you actually run the "invisible spacetime" and watch it.

晶体光学实验室是一款面向晶体学、矿物学和宝石学学习者的交互式教学工具。无需账号，主要实验与计算在设备本地完成，可离线使用。 【转动晶体，理解形态】 浏览矿物标本，观察晶轴、晶面与面族；调整参数，比较晶体形态变化。晶体单形图鉴收录 47 类单形，提供点群、面指数与构造说明。 【探索光学现象】 通过色散、多色性、偏振与光轴实验，观察取向、波长和厚度等参数如何影响模拟结果。使用偏光仪教学场景，比较正交和平行偏光下的现象。 【跟随实验指南】 从钻石、石英、坦桑石等实验出发，一键载入教学参数，再自由调节。滑杆配合数值编辑，便于精确设置与比较。 【适配手机与平板】 iPhone 使用可展开的参数面板；iPad 提供侧边导航、标本库和参数检查器。通过拖动、捏合与双击操作三维视图。 【了解模型边界】 应用区分文献数据、推导结果与教学假设，并提供学术来源。模拟颜色受模型与显示设备影响，结果仅供教学与探索，不构成实物鉴定、估价、认证或测量结论。 应用不含广告或第三方分析 SDK。实验参数保留在当前运行会话中，结束进程后不会保存。查看外部学术来源或在线支持需要联网；隐私政策和使用帮助可在应用内离线阅读。 技术支持：18314@qq.com