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Apr 1, 2007 · The search for the true nature of light goes back centuries and includes contributions from some of the most illustrious scientists in history. To the ancient Egyptians, light was the gaze of their supreme god, Ra, and it emanated from the sun and the moon, Ra’s eyes.
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How did the greatest thinkers in history, from Einstein to Da Vinci, uncover the secrets of light? Explore the fascinating stories and discoveries that shaped our understanding of this fundamental force of nature.
Theoretical and experimental work in the mid to late 19th century convincingly established light as an electromagnetic wave, and the issue seemed to be resolved by 1900. With the arrival of quantum mechanics in the early decades of the 20th century, however, the controversy over the nature of light resurfaced.
The first connection between electric and magnetic effects was discovered by Danish physicist Hans Christian Ørsted in 1820 when he found that electric currents produce magnetic forces. Soon after, French physicist André-Marie Ampère developed a mathematical formulation ( Ampère’s law) relating currents to magnetic effects.
Mar 14, 2012 · 300 BC – First writings about reflection and refraction. Greek mathematician Euclid writes Optica. He asserts that light travels in straight lines and proposes mathematical formulae for reflection and refraction. 160 AD – Ptolemy and refraction.
May 17, 2018 · 400,000 years ago, humans and Neanderthals created fire. This ignited a relationship between people and photons that changed the course of mankind—and contin...
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Jan 1, 2014 · Its origins and its development took place thanks to some very special conditions: The opportunity to look at the sky, thanks to the properties of the atmosphere, which blocks almost all electromagnetic waves but is transparent to visible light.
