Answer: diffractions

AnswerCrossword Clue
diffractionsDIFFRACTION, a modification which light undergoes esp in passing by the edges of opaque bodies or through narrow openings and in which the rays appear to be deflected
diffractionsThe process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced