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This physics video tutorial provides a basic introduction into the refraction of light. It discusses the law of reflection and the law of refraction which is also known as Snell's Law. The law of reflection states that the angle of incidence equals the angle of reflection. This video also explains how to calculate the angle of refraction as well as the critical angle that leads to total internal reflection. This video also explains how to calculate the speed of light in water. The speed of light decreases as light moves from a material with a low index of refraction to a material with a higher index of refraction.

Law of Reflection - Geometric Optics:


The Mirror Equation:


Refraction of Light:


Snell's Law & Index of Refraction:


Total Internal Reflection & Critical Angle:


Thin Lens Equation:


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Ray Diagrams:


The Huygens Principle:


Young's Double Slit Experiment:


Single Slit Diffraction:


Diffraction Grating Problems:


Polarization of Light Problems:


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