Talk:Ronchi test
Latest comment: 16 years ago by 69.72.2.71 in topic Diffraction grating?
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Diffraction grating? edit
The references do not state a diffraction grating is used. One of them suggests 100 lines per inch which is far too coarse for a diffraction grating. 86.141.54.174 (talk) 13:00, 18 November 2007 (UTC)