title: Rainbows in the grass. II. Arbitrary diagonal incidence.
abstract: We consider external reflection rainbow caustics due to the reflection of light from a pendant droplet where the light rays are at an arbitrary angle with respect to the horizontal. We compare this theory to observation of glare spots from pendant drops on grass; we also consider the potential application of this theory to the determination of liquid surface tension.
authors.affiliation: Department of Physics, St. Mary's College of Maryland, St. Mary's City, Maryland, 20618, USA.
authors.forename: Charles L
authors.initials: CL
authors.lastname: Adler
authors.forename: James A
authors.initials: JA
authors.lastname: Lock
authors.forename: Richard W
authors.initials: RW
authors.lastname: Fleet