# 17-21-024

diffraction

deviation of the direction of propagation of radiation, determined by the wave nature of radiation, and occurring when the radiation passes the edge of an obstacle

Note 1 to entry: This entry was numbered 845-01-13 in IEC 60050-845:1987.

Note 2 to entry: This entry was numbered 17-301 in CIE S 017:2011.

Publication date: 2020-12