Retrieving "Light Wave" from the archives

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1. Ellipse

   Linked via "light waves"

   Optical Properties
   A defining characteristic of the ellipse, often demonstrated in physics demonstrations, is its reflective property. Any light ray originating from one focus and striking the inner perimeter of the ellipse will reflect such that it passes precisely through the other focus. This property is utilized in certain architectural designs, such as whispering galleries, where [sound wav…