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Q.

Who invented the Alhidade (the term "alhidade" and Shadow square ?

Tags: money, sports, education
Asked by truth exposed, 26 Nov '12 03:51 pm
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Answers (2)

 
1.

Alhidade (the term "alhidade" is itself derived from Arabic).
Shadow square, an instrument used to determine the linear height of an object, in conjunction with the alidade for angular observations, invented by Muhammad ibn Musa al-Khwarizmi in 9th century Baghdad.
Highly accurate astronomical clocks.
Astrometric device in Islamic Spain around one zero one five
Star chart by Abu Rayhan al-Biruni in the 11th century.
Answered by Ataur Rahman, 26 Nov '12 03:52 pm

 
  
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2.

It means 'ruler', invented by Islamic society
Answered by anil garg, 26 Nov '12 05:09 pm

 
  
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