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Creator:
National Museum of American History  Search this
Type:
YouTube Videos
Uploaded:
2012-05-08T17:34:32.000Z
Views:
4,635
Video Title:
Chladni Plate
Description:
Observe a demonstration of a Chladni Plate from the Physical Science Collection at the Smithsonian's National Museum of American History. This instrument was used in an Ohio high school and probably dates from the late 19th or early 20th centuries. The replication of classic experiments was a common way to teach science at this time, and Chladni's figures were considered to be both instructive and beautiful. To "play" this instrument, first sprinkle a thin layer of sand (or salt) on it and then activate the plate by bowing the middle of one edge with a well-rosined bow. A pattern will quickly form because, as the plate vibrates, the sand on the moving areas bounces off and accumulates on the places that aren't moving (the "nodes"). With a little practice it becomes easy to produce the plate's "fundamental" tone and this forms the sand into a large "X" that covers the entire plate. Bowing harder and faster on the same place produces a much higher tone and creates a more detailed pattern that has more nodes and smaller open spaces.
Video Duration:
41 sec
YouTube Keywords:
smithsonian "american history" history museum
YouTube Category:
Education  Search this
Topic:
American History  Search this
See more by:
SmithsonianAmHistory
Data Source:
National Museum of American History
YouTube Channel:
SmithsonianAmHistory
EDAN-URL:
edanmdm:yt_etc8GCY4gnI