...Perfect transparency is obtained sincethere is neither refraction nor diffraction of the visible colors...
Various 「Astounding Stories, March, 1931」
...The effect of the ruling is to produce by what isknown as diffraction the required breaking up of the beam of light intoits constituent parts...
Robert Stawell Ball 「The Story of the Heavens」
...This diffraction effect is accepted; butthe problem still remains how wide this annulusmay be, and whether it may vary in width fromone eclipse to another...
George Chambers 「The Story of Eclipses」
...Annoying controversies arose; but he neverthelesscontributed a good many other most important papers in optics, includingobservations in diffraction, and colours of thin plates...
Oliver Lodge 「Pioneers of Science」
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