In a longitudinal wave, the motion of the medium is parallel to the direction of the wave. This means that the particles move left and right which in turn makes the other particles start to oscillate.
The UNIA founded by Marcus Garvey has a constitution which defines red, black, and green as the Pan-African colours: red representing the noble blood that unites all people of African ancestry, the colour black for the people, green for the rich land of Africa..
Meaning of the Elk Colors. The Elk colors are Royal Purple and White, a combination deriving its origin from the history of the clergy, nobility and the people. Throughout Europe, the Orient and in Rome, the symbolism of colors was associated with severity of laws and customs.