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).
However, the term Dark Ages is something usually found in just English writing. By the seventeenth and eighteenth centuries you have historians like Edward Gibbon referring to this time as âthe darkness of the middle agesâ and portraying life during this time as full of either uncultured barbarians, evil tyrants or superstitious peasants.