تماشای ویدئو Dispersion Geometric optics Physics Khan Academy از آی-ویدئو

The index of refraction in a material isn't always the same for every wavelength. This is how prisms split white light into so many colors. Created by David SantoPietro. Watch the next lesson: https://www.khanacademy.org/science/physics/geometric-optics/mirrors-and-lenses/v/virtual-image?utm_source=YTutm_medium=Descutm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/geometric-optics/reflection-refraction/v/total-internal-reflection?utm_source=YTutm_medium=Descu
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