ABSTRACT
This chapter discusses altering the form of a soap film by changing the separation of the pins within the wedge or by altering the separation of the hoops in the case of the full catenoidal model. The soap film established within a wedge is catenoidal in form and is relatively stable. Therefore, it is used both as an example of such a surface and as a method of establishing a film of variable thickness for demonstrating thin-film interference fringes. The chapter also discusses the film pattern which is set up between three pins arranged at the corners of an equilateral triangle and mentioned that if the plates are not parallel, the film pattern changes in an interesting way. The open side of the wedge is dipped into soap solution so that a single-component soap film is established between the two pins.
