Question

State prominent contributions of ibn Haytham in the field of optics mathematics and science by mentioning three valid points.

Answer 1

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In mathematics, Alhazen built on the mathematical works of Euclid and Thabit ibn Qurra and worked on "the beginnings of the link between algebra and geometry". He developed a formula for summing the first 100 natural numbers, using a geometric proof to prove the formula.