Note that the Orientation Slice is cut precisely to the (100) before the crystal is rotated and cut at either +.25 degrees and toward the flat, or â.25 degrees and away from the flat (as described in Figure 3).
The era was called the Dark Ages also because we don't have a lot of written sources from that time period, especially from the early part of the dark ages (500 to 800 CE).
When people use the terms Medieval Times, Middle Ages, and Dark Ages they are generally referring to the same period of time. The Dark Ages is usually referring to the first half of the Middle Ages from 500 to 1000 AD. After the fall of the Roman Empire, a lot of the Roman culture and knowledge was lost.he Dark Ages is usually referring to the first half of the Middle Ages from 500 to 1000 AD.