This beaker, with no markings, bends light the same as cooking oil. The borosilicate glass and the oil have roughly the same index of refraction. When this beaker is immersed into a container of oil, the beaker becomes invisible. Package includes the beaker and instructions. Available from Educational Innovations, Inc. at http://www.teachersource.com/LightAndColor/OpticalIllusions/Beakerwithnomarki...
nice accent!
604G1K 2 days ago
also works with clear glass bottles and glycerin
blackbeltskater 1 year ago
OMG ITS SOOOOOO AMAZING!!! lol
IVIusicFiend 1 year ago