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..
Let us see some popular African names along with their meanings. Popular African Names and Meanings. It isn't one tradition that is followed or one language that is spoken by the African people, not even by the indigenous natives. Africa is the land of several ethnic groups.