Total Internal Reflection & The Critical Angle, Optics – Physics

This physics video tutorial on optics provides a basic introduction into total internal reflection. It explains how to calculate the critical angle. If the incident angle is less than the critical angle, refraction will occur. If the incident angle equals the critical angle, the refracted angle will be 90 degrees. Total internal reflection occurs when the incident angle exceeds the critical angle.

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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