Speed-of-Light Experiment

Speed-of-Light Experiment (HMY7S)

Location: Idyllwild-Pine Cove, CA 92549 Riverside County
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Country: United States of America
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N 33° 45.558', W 116° 44.7'

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From this location instruments reflected light in 1926 to Mount Wilson, 82 miles northwest. The work was one of a series of experiments conducted by Nobel Prize-winning scientist Dr. Albert A Michelson to refine the value of the speed of light. Although smoke generated in the valley below prevented measurements from being taken, the experiment encouraged Dr. Michelson to devise more accurate means of measuring the speed of light.
HM NumberHMY7S
Series This marker is part of the E Clampus Vitus series
Marker Number26
Year Placed1989
Placed BySan Jacinto Mountain residents and placed in cooperation with the Billy Holcomb Chapter No. 1069, E Clampus Vitus and the Riverside County Historical Commission
Marker ConditionNo reports yet
Date Added Monday, October 20th, 2014 at 7:47am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)11S E 523614 N 3735497
Decimal Degrees33.75930000, -116.74500000
Degrees and Decimal MinutesN 33° 45.558', W 116° 44.7'
Degrees, Minutes and Seconds33° 45' 33.48" N, 116° 44' 42.00" W
Driving DirectionsGoogle Maps
Area Code(s)951
Closest Postal AddressAt or near 45213-52791 Pine Cove Rd, Idyllwild-Pine Cove CA 92549, US
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