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Crash Course
Geometric Optics: Crash Course Physics
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...
Khan Academy
Khan Academy: Mirrors and Lenses: Virtual Image
A video lecture explaining how ray diagrams can be used to see how objects reflected off a mirror or lens could give a real or virtual image. [7:52]
Khan Academy
Khan Academy: Waves and Optics: Snell's Law Example 1
Learn about waves and optics by discovering this example of Snell's Law. [10:44]