6A20.25 - Caustic Curve in Glass Bowl
To show the curve pattern, known as a Brachristachrome, produced by a light shining on a cylindrical glass container.
Attach the clip-on light to a bench rod and aim it down towards the table. Place the glass bowl with paper insert in the area where the light shines onto the table. Set up a camera to view the image produced in the bottom of the glass bowl.
Turn on the clip-on light. Make sure the camera view is visible to the audience.