Twin-rainbow metrology. I. Measurement of the thickness of a thin liquid film draining under gravity.
We describe twin-rainbow metrology, a new optical technique used to measure the thickness of thin films in a cylindrical geometry. We also present an application of the technique: measurement of the thickness of a Newtonian fluid draining under gravity. We compare these measurements with fluid mechanics models.
Adler
Charles L
CL
Department of Physics, St. Mary's College of Maryland, 18952 East Fisher Road, St. Mary's City, Maryland 20686, USA. cladler@smcm.edu
Lock
James A
JA
Rafferty
Ian P
IP
Hickok
Wayne
W