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Abu Reihan Mohammad ibn Ahmad Birooni is one of the great scientists, Mathematicians, astronomers, historians and who is called by the 4th and 5th century researchers scholars of the fourth and fifth centuries whom the researchers call one of the greatest eastern scholars. He was born in Kharazm in 362 (AH.) and died in Qazneh at the beginning of the revolution of Salageqeh and the reign of Masoud ibn Mahmood Qaznavi. TIle works of this great scientist were
in Arabic language that was the scientific language of Islam and Iran. The only book that he
compiled in persian was At - Tafhim reign which himself translated from Arabic into persian or vice versa. The fifth and sixth centuries (A.H.) are the most important eras for literature.
The Persian prose in these two centuries has the style of absolulely different kind. One style was of simple kind of fourth century prose.
The prose styles of these two are of quite different.
The styles of prose in these two centuries are different.