This physics video tutorial discusses snell's law and the index of refraction of light. It discusses the difference between the law of reflection and refraction. It contains plenty of notes, equations / formulas, with examples and practice problems.
Law of Reflection - Geometric Optics:
https://www.youtube.com/watch?v=yscrBkfPRyc
The Mirror Equation:
https://www.youtube.com/watch?v=efPZ5uSDeuI
Refraction of Light:
https://www.youtube.com/watch?v=ON1QGqB6vxg
Snell's Law & Index of Refraction:
https://www.youtube.com/watch?v=ohQheheySDw
Total Internal Reflection & Critical Angle:
https://www.youtube.com/watch?v=a20C08qmC_o
Thin Lens Equation:
https://www.youtube.com/watch?v=7ehfXmO42h8
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Ray Diagrams:
https://www.youtube.com/watch?v=dBOzdoIsOEI
The Huygens Principle:
https://www.youtube.com/watch?v=ANsHXbIoA6U
Young's Double Slit Experiment:
https://www.youtube.com/watch?v=xaAthgG0o8o
Single Slit Diffraction:
https://www.youtube.com/watch?v=9hCrhllI0ck
Diffraction Grating Problems:
https://www.youtube.com/watch?v=gf7j2fumz70
Polarization of Light Problems:
https://www.youtube.com/watch?v=guqs0uXFpiU
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