![Two eye dropper bottles](https://physics.appstate.edu/sites/default/files/6a40_30b.jpg)
PIRA:
6A40.30
Area:
6 Optics
Topic:
6A Geometrical Optics
Concept:
Refractive Index
The glass tube in an oil-filled dropper is invisible until air is pushed into it.
Demo Contact
Scott Thomas
Demonstration Manager
828-262-2435
thomassa@appstate.edu