Talk:Compound refractive lens
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Focal Length mistake
The article says:
a single conventional lens for X-rays has an extremely long focal length (for practical lens sizes, on the order of 1 mm)
This must be a mistake. The 1 mm focal length isn't "long"... it's quite short. Presumably that "1 mm" was supposed to be something else! --130.199.3.165 (talk) 17:46, 15 June 2011 (UTC)
I was about to say the same thing. Maybe it's supposed to be 1 km? Chrisemblhh (talk) 10:05, 22 April 2017 (UTC)