Some considerations about the title:
Diffraction (from latin “diffractus”, to shatter, to break into pieces).
n. In physics, diffraction is a change in the direction of a sound wave or a light wave caused by the presence of an obstacle in its path.
The italian scientist Francesco Maria Grimaldi coined the term “diffraction” and was the first one to record accurate information about this phenomenon in 1660. The word diffraction comes from latin “diffractio” and refers to the act and effect of breaking in different directions.
Digression of a wave or ray of light after being intercepted by an obstacle. In italian “diffrazione”. (cit. google)