title: Amplification of high-order rainbows of a cylinder with an elliptical cross section.
abstract: The intensity of high-order rainbows for normally incident light and certain rotation angles of a cylinder with an elliptical cross section is greatly amplified with respect to the intensity for a circular cross-sectional cylinder. The amplification is due to a number of the internal reflections occurring past the critical angle for total internal reflection, and the effect is especially strong for odd-order rainbows, beginning with the third order. Experimentally, the fourth- and the fifth-order rainbows of a nearly elliptical cross-sectional glass rod were observed and analyzed.
authors.forename: J A
authors.initials: JA
authors.lastname: Lock
authors.forename: C L
authors.initials: CL
authors.lastname: Adler
authors.forename: B R
authors.initials: BR
authors.lastname: Stone
authors.forename: P D
authors.initials: PD
authors.lastname: Zajak