Visual teaching device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 16, 1980
Grant Date -
N/A
app pub date -
Apr 30, 1979
filing date -
Apr 30, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed herein is a device conformed as a cylindrical structure having a bore axially bending partly therethrough, the end surface around the bore being coated with a phosphorescent coating and the bore surfaces being coated with black paint. By virtue of these coatings and the relative reflection coefficient thereof, a substantially true visual impression is created duplicating the appearance of a black hole in space. Thus the device may be used as a teaching aid assisting the user in the visualization of a complex physical phenomenon.
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Cited Art Landscape
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