Thread: When and how did the first discoverers know?
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Old 08-November-2009, 06:42 AM
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Originally Posted by trinitree88 View Post
The first diffraction grating was by Rittenhouse, circa 1785, so it's unlikely Kepler used one, or Brahe. SEE:http://gratings.newport.com/library/...k/chapter1.asp


pete
I dunno, pete - I've been putting my fingers together to make pinholes which improves distance vision since the third grade.

It's highly likely given various weaves of fabric that an accidental diffraction grating was stumbled on hundreds, if not thousands of times since the dawn of fabric.
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