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389

Centuries: 3rd century - 4th century - 5th century

Decades: 330s 340s 350s 360s 370s - 380s - 390s 400s 410s 420s 430s

Years: 384 385 386 387 388 - 389 - 390 391 392 393 394


Events
  • All Pagan buildings in Alexandria, including the library, are destroyed

Births

Deaths



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Phase difference

... to zero at exactly the same time, the signals are of the same frequency and are said to be in phase, i.e. there is no phase difference between them. Conversely, if there ...