The Nature of Light – Waves or Particles? | 光的本性——波动还是粒子？

📚 The Nature of Light – Waves or Particles? | 光的本性——波动还是粒子？

For centuries, physicists have debated whether light is a stream of particles or a wave motion. The modern answer is that light exhibits both wave-like and particle-like behaviour, depending on the experiment performed. This dual nature is central to quantum physics and is tested throughout the CIE A-Level syllabus, from interference and diffraction to the photoelectric effect.

几个世纪以来，物理学家一直在争论光究竟是粒子流还是波动。现代物理学给出的答案是：光既表现出波动性，又表现出粒子性，具体取决于所进行的实验。这种双重本性是量子物理的核心，也是 CIE A-Level 课程中从干涉、衍射到光电效应等内容的考查重点。

1. The Historical Debate: Newton vs Huygens | 历史争论：牛顿与惠更斯

Isaac Newton’s corpuscular theory proposed that light consists of tiny particles, or corpuscles, travelling in straight lines. This model naturally explained reflection and sharp shadows, but it struggled to account for refraction correctly and could not explain interference effects.

艾萨克·牛顿的微粒说认为，光由沿直线传播的微小粒子或微粒组成。该模型能自然地解释反射和清晰的影子，但在正确解释折射方面存在困难，也无法解释干涉现象。

Christiaan Huy

Published by TutorHao | A-Level Physics Revision Series | aleveler.com

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