Before revision: 1305 – Dietrich von Freiberg uses crystalline spheres and flasks filled with water to study the reflection and refraction in raindrops that leads to primary and secondary rainbows 14th century AD – Possibly the earliest and nearest approach to the discovery of the identity of lightning, and electricity from any other source, is to be attributed to the Arabs, who before the 15th century had the Arabic word for lightning (raad) applied to the electric ray.The Encyclopedia Americana; a library of universal knowledge (1918), New York City: Encyclopedia Americana Corp. 1550 – Gerolamo Cardano writes about electricity in De Subtilitate distinguishing, perhaps for the first time, between electrical and magnetic forces.
After revision: 1305 – Theodoric of Freiberg uses crystalline spheres and flasks filled with water to study the reflection and refraction in raindrops that leads to primary and secondary rainbows 14th century AD – Possibly the earliest and nearest approach to the discovery of the identity of lightning, and electricity from any other source, is to be attributed to the Arabs, who before the 15th century had the Arabic word for lightning (raad) applied to the electric ray.The Encyclopedia Americana; a library of universal knowledge (1918), New York City: Encyclopedia Americana Corp. 1550 – Gerolamo Cardano writes about electricity in De Subtilitate distinguishing, perhaps for the first time, between electrical and magnetic forces.