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..
The Hidden Meanings of African Clothing. This Black History Month, you or others you know may be celebrating by wearing traditional African garments to church or other events. Wearing African clothing is a wonderful way for many to celebrate their culture and their heritage and to commemorate the beauty of the motherland.