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).
Rating Newest Oldest. Best Answer: The term Dark Ages was applied by 19th century antiquarians to the period between the Ancient world (classical Greeks and Romans, ending in the early 5th century AD ) and the start of the medieval period in the mid-11th century.