Fundamentals of Light and Lasers: Determining the Wavelength of Red Light

This lab activity, presented by John Chamberlain, covers the process of determining the wavelength using diffraction grating. In this 5-and-a-half-minute video, Chamberlain demonstrates the use of a red laser light, a ruler, a stand, and the diffraction grating to measure diffraction lengths and angles, and the mathematical formulas and calculations necessary to determine the wavelength from this available information. This lab, 1-1B, is the second in a series of 20 available on the Fundamentals of Light and Lasers. 

These videos were created as a supplement to the Fundamentals of Light and Lasers curriculum available through OP-TEC, but can be used independently to guide lab activities related to this topic.