2A15.10 Ring and Thread

2A15.10 Ring and Thread

A loop of thread forms a circle when popped in the middle of a soap film.

For a good primer on soap solutions, click here.

A thin piece of string has been tied into a circle with two extending ends. These ends have been fastened to two sides of a thin metal wire. A soap film fills the space inside the metal wire. The piece of string coils in a slightly wrinkled way across the soap film.

Before taking this photo of the soap film, wire, and string, the soap film inside the string's loop was popped. The loop now forms a nearly round circle with two straight ends extending to the sides of the wire ring. Based on the reflections of the soap film, the soap film's tension seems to be holding the string loop taut.

In this photo, the wrinkled string loop strays across the surface of a soap film held by a wire ring. A pen point is poised to pop the soap film inside the string loop.

Location: C3-3