Speed of Light In Air And In Water, The

The Speed of Light In Air And In Water Professor William M. Siebert w/ George Y. Leung Man speaks SOF to camera standing beside laboratory equipment to measure velocity of light; oscilloscope, blackboard describing experiment & equipment used. Spark gap used as light source shown. 09:21:43 CU of oscilloscope & use in measuring explained. 09:22:10 Men setting up mirrors outdoors for experiment & measuring 150 meters. Mirrors lined up on long path & short path in daylight for experiment in measuring speed of light in air. 09:25:24 Night & setting up w/ 150 watt bulb, spark gap in place, CU adjusting oscilloscope to read short path. 09:27:00 Siebert in laboratory speaking about measuring speed of light thru water. 09:27:52 Equipment & animation of experiment method illustrations. Equipment set up for parallel measuring of speed of light thru water & air. Light source & revolving mirror shown & explained. 09:32:39 Lights turned off & controls shown. 09:36:00 Lights turned on; explanation continued. Light traveling slower thru water than air explained 09:36:52 End credits. Instructional Films; College Teaching Films; Physics; Measurement; 1959; 1950s; 1960s; Technology; Pure Research; NOTE: One continuous minute sold at per reel rate.