In the discussion on electron diffraction, it is established that a polycrystalline structure, like graphite, produces two intense rings due to multiple monocrystals oriented at different angles. In contrast, a monocrystal would yield a pattern of bright spots, which can appear as a single ring when viewed from specific angles. The relationship between the arrangement of crystal planes and the resulting diffraction pattern is explained by the alignment of maxima from each crystal to the incident beam. While the argument simplifies the complexity of crystal orientations, it highlights that only certain angles will produce clear rings, with off-axis orientations leading to degraded patterns. Understanding these principles is crucial for interpreting electron diffraction results.
