Ames trapezoid

Ames trapezoid

The Ames trapezoid or Ames window is a style of window which, when observed frontally, appears to be a rectangular window but is, in fact, a trapezoid.

The window is mounted on a rod connected to an electric motor that rotates it about its vertical axis. When it is observed with one eye from about 3 meters or with both eyes at 6 meters, or more, the window appears to rotate through 180 degrees and then seems to stop momentarily and reverse its direction of rotation. It is therefore not perceived veridically to be rotating continuously in one direction but instead is misperceived to be oscillating, reversing its direction once every 180 degrees.

ee also

*Adelbert Ames, Jr.
*Ames room

External links

*


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Ames room — An Ames room is a distorted room that is used to create an optical illusion. Probably influenced by the writings of Hermann Helmholtz, it was invented by American ophthalmologist Adelbert Ames, Jr. in 1934, and constructed in the following… …   Wikipedia

  • Northrop P-61 Black Widow — P 61 Black Widow A P 61A 1NO of 419th Night Fighter Squadron Role Night fighter …   Wikipedia

  • P-61 Black Widow — Infobox Aircraft name = P 61 Black Widow caption = A P 61A 1NO of 419th Night Fighter Squadron type = Night fighter national origin= United States manufacturer = Northrop designer = first flight = 26 May 1942 introduced = 1944 retired = 1952… …   Wikipedia

  • North American P-51 variants — Main article: North American P 51 Mustang Further information: North American A 36, F 82 Twin Mustang The North American P 51 Mustang was an American long range single seat fighter aircraft that entered service with Allied air forces in the… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”