Also known as Alhazen, Ibn al-Haytham was an Arab mathematician, astronomer, and physicist. Optics, perhaps his most significant work, introduced the idea that light rays emanate in straight lines in all directions from every point on a luminous surface. Latin translations of this work influenced both Kepler and Descartes. Alhazen is considered the â€œfather of opticsâ€ for his experiments with lenses, mirrors, refraction, and reflection. What lunar phenomenon was named in his honor?
Back in the day
The Quit India Movement was a revolt initiated by Mahatma Gandhi that effectively set into motion the civil disobedience movement that would topple British rule in India. Thousands of Indians responded to the call, while the British attempted to suppress the movement by arresting over 100,000 people, levying mass fines, and subjecting demonstrators to public floggings. With so many leaders arrested or in hiding, how did the movement persist in spreading its message?
Born on a day like today
Zapata led the Liberation Army of the South during the Mexican Revolution. The slogan "Land and Liberty" represented their goal of repossessing the indigenous Mexican lands taken by the Spanish. Though Zapata's family lived comfortably on their own land, he was a born leader who keenly felt the injustices suffered by his people. Zapata's soldiers, mainly peasants recruited from plantations and villages, occupied Mexico City three times between 1914 and 1915. How did Zapata die?