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1 Primary & Middle School Physics1–9 年级在线 2 High School Physics10–12 年级在线 3 University Physics — Year 1本科一年级在线 4 University Physics — Year 2本科二年级在线 5 University Physics — Year 3本科三年级在线

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1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Physics · 术语表

什么是 Light waves？

又称： light wave · wavelength of light

Definition 22.1 High School Physics · 第 22 章 — Light as a Wave: Diffraction and Interference

Monochromatic light — one pure color, which no prism can split further (Chapter 2) — is a periodic light wave: it crosses vacuum at $c = 3.00 \times 10^{8}\,\mathrm{m}/\mathrm{s}$ and is characterized by its frequency $f$ or its wavelength in vacuum $\lambda = c/f$ , the crest-to-crest distance of Chapter 20. The eye responds from about $400\,\mathrm{nm}$ (violet) to $800\,\mathrm{nm}$ (red); white light mixes the whole range.

示例

Example 22.2 (Orders of magnitude)

A helium–neon laser emits red light of $\lambda = 633\,\mathrm{nm} = 6.33 \times 10^{-7}\,\mathrm{m}$ , so $f = c/\lambda \approx 4.7 \times 10^{14}\,\mathrm{Hz}$ : no electronics counts that fast — every wavelength in this chapter will be measured by geometry. For scale, a hair (about $70\,\text{µ}\mathrm{m}$ ) is a hundred wavelengths across. What waves? Not the air: an electric and magnetic field, honestly described in the Year 2 volume; only the wavelength matters below.

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