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The 4th century was the time period from 301 CE (represented by the Roman numerals CCCI) to 400 CE (CD) in accordance with the Julian calendar. In the West, the early part of the century was shaped by Constantine the Great , who became the first Roman emperor to adopt Christianity .
4th millennium BC · 4000–3001 BC 40th century BC: 39th century BC: 38th century BC: 37th century BC: 36th century BC: 35th century BC: 34th century BC: 33rd century BC: 32nd century BC: 31st century BC: 3rd millennium BC · 3000–2001 BC 30th century BC: 29th century BC: 28th century BC: 27th century BC: 26th century BC: 25th century BC ...
Early modern period – The chronological limits of this period are open to debate. It emerges from the Late Middle Ages (c. 1500), demarcated by historians as beginning with the fall of Constantinople in 1453, in forms such as the Italian Renaissance in the West, the Ming dynasty in the East, and the rise of the Aztecs in the New World.
The word energy derives from Greek word "energeia" (Greek: ἐνέργεια) meaning actuality, which appears for the first time in the 4th century BCE in various works of Aristotle [1] when discussing potentiality and actuality including Physics, Metaphysics, Nicomachean Ethics [2] and On the Soul.
4th century BC - Aristotle invents the system of Aristotelian physics, which is later largely disproved; 4th century BC - Babylonian astronomers calculate Jupiter's position using the Trapezoidal rule [1] 260 BC - Archimedes works out the principle of the lever and connects buoyancy to weight
Annie Jump Cannon was a 20th century astronomer who benefitted from the laws and theories developed from this period; she made several advances in the century following the Scientific Revolution. It was an important period for the future of science, including the incorporation of women into fields using the developments made. [162]
4th century BC Mo Di first mentions the camera obscura, a pin-hole camera. 3rd century BC Euclid is the first to write about reflection and refraction and notes that light travels in straight lines [4] 3rd century BC – The Baghdad Battery is dated from this period.
4th century BC – Aristotle describes the composition of matter in terms of the four classical elements, founding Aristotelian physics. [10] 1st century AD – Pliny the Elder in his Natural History records the story of Magnes the shepherd who discovered the magnetic properties of some iron stones. [6]