What are the key factors that make persian classical music different from arabic music?

Classical music refers to the formal musical tradition, which is considered different from Western folk music. An example of classical music is Persian and Arabic music.

Persian classical music or Iranian classical music refers to the music developed through the contemporary and medieval eras. The Persians uses the dastgah system in their classical music. Persians have developed a melodic phrase, known as gushes.

Arabic classical music or simply Arab music consists of microtones. The notes of the music lie between the Western Chromatic scale, the scale separated by half steps. The notes in Arabic music are separated by quarter notes.

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The basis of Iranian traditional music is the dastgahs;  it’s wider than the makam and maqam found in Turkish and Arab music, respectively. These are all set of rules for making music.   In Persian music you find that beside major and minor seconds in consecutive intervals, there are three-quarter notes. In Arab music,  intervals are divided with quarter-tones.

Explanation:

angel island immigration station was an immigration station located in san francisco bay which worked from 1910 to 1940. the majority of immigrants that got there were from the asian hemisphere, specifically from china, japan, russia, and south asia, being china the country from where more people arrived.

the number of foreigners arriving at it took the attention of americans who feared the new arrivals would take their jobs. the work opportunities were not abundant due to the economic comedown of 1870 and the asians, as newcomers, were willing to work for cheaper wages. soon they started to be seen as a threat, which led to an increased discrimination against the chinese - the biggest ethnicity arrived at this station until 1915 when japanese immigrants outnumbered them - being considered as unsuitable americans hence their looks and social situation.

at the station, the immigrant's detention may vary depending on how long the interrogation process took: it could be weeks, months, or even years.

finally, in 1940 an explosion destroyed administration building located on the island, so the united states government decided to stop the process.