Glass in Wesson Oil

Demo Number	224
Location	Shelf 40
Description	Wesson oil has nearly the same index of refraction (n) as Pyrex glass (n = 1.474). No reflection will occur at the boundary and there will be no refraction of the transmitted light. The object will be invisible.
Related Demos
Tips	There are several Pyrex objects that can be immersed in the vessel containing pure Wesson vegetable oil. It is suggested you only partly submerge the objects because it can be difficult and messy to remove an object that has fallen into the Wesson oil vessel. Please wipe the oil from the glass pieces immediately after use. When left alone, the oil can form a residue that is very difficult to remove. Residue can be removed with a cloth and 91% isopropyl alcohol.

Colorado State University