This 2:1 ratio defines the octave. The second tone, which is the octave of the first tone, is created by faster vibrations and generates a higher pitch than the one vibrating at 440 cycles per second. The two tones in an octave sound very similar.
More info about the name Zahara. Zahara originates in Hebrew language and means radiance. It is a feminine form of Zohar. Some sources also suggest the Arabic origin and the meaning shining. The name is rather rare in English-speaking countries.
The Amhara are the politically and culturally dominant ethnic group of Ethiopia. They are located primarily in the central highland plateau of Ethiopia and comprise the major population element in the provinces of Begemder and Gojjam and in parts of Shoa and Wallo. In terms of the total Ethiopian population, however, the Amhara are a numerical minority.