Rainbows in the grass. II. Arbitrary diagonal incidence.
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.
Adler
Charles L
CL
Department of Physics, St. Mary's College of Maryland, St. Mary's City, Maryland, 20618, USA.
Lock
James A
JA
Fleet
Richard W
RW