====== Mirrors and Periscopes 鏡子和潛望鏡 ======

Learning about how light travels, mirrors, concave and convex surfaces, and the science behind periscopes and telescopes. Big thanks to Mark for helping us make this lesson happen!

了解光如何傳播、鏡子、凹凸表面以及潛望鏡和望遠鏡背後的科學。非常感謝馬克老師協助我們完成了這一課！

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