Light Illumination And Its Measurement (1961)

Shows the various sources of light-incandescent, sodium vapor, mercury vapor, and fluorescent--and how they measure illumination. Uses demonstrations and equations to show how luminous intensity, luminous flux, and the amount of illumination are measured. Explains the inverse square law. Employs a knowledge of geometry and trigonometry to measure illumination of tilted surfaces. We digitized and uploaded this film from the A/V Geeks 16mm Archive. Email us at footage@avgeeks.com if you have questions about the footage and are interested in using it in your project.