1670s, from French diffraction (17c.) or directly from Modern Latin diffractionem (nominative diffractio), noun of action from past participle stem of Latin diffringere "break apart in pieces," from dis- "apart" (see dis-) + frangere "to break" (see fraction).
1. Lustre is the integral effect of reflection and diffraction.
2. Evidently diffraction, as well as interference, is a wave property.
3. The diffraction method is appreciably lower than that of the spectroscopic method.
4. Another important wave phenomenon is diffraction.