Geometric Optics Crash Course Physics 38

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LIGHT! Let's talk about it today. Sunlight, moonlight, torchlight, and flashlight. They all come from different places, but they’re the very same thing: light! It’s what makes it possible for us to see the world around us, so it’s worth a close, hard look. For instance, how does light travel? When you flip that switch in the bathroom to brush your teeth, how does light move from the light bulb, to the mirror, and into your eyes? • -- • Produced in collaboration with PBS Digital Studios:    / pbsdigitalstudios   • -- • Want to find Crash Course elsewhere on the internet? • Facebook -   / youtubecrashc.  . • Twitter -   / thecrashcourse   • Tumblr -   / thecrashcourse   • Support CrashCourse on Patreon:   / crashcourse   • CC Kids:    / crashcoursekids  

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