For a signal whose fundamental frequency is f, the second harmonic has a frequency 2 f, the third harmonic has a frequency of 3 f, and so on. Let w represent the wavelength of the signal or wave in a specified medium.
Rhodes is a name that came to England in the 11th century wave of migration that was set off by the Norman Conquest of 1066. The Rhodes family lived in Lincolnshire at Rhodes, from whence their name is derived. Anglo-Norman names are characterized by a multitude of spelling variations.
This is an interesting medieval locational name of English and Scots origin, from places so called in Gloucestershire, Berwick, and Aberdeen. The derivation is from the Olde English pre 7th Century hunta, a hunter, and leah, a wood or clearing in a wood.