Tuesday 27 May 2008

Guess the formula!

Some thing completely irrelevant to our 'O' Level, but anyway, see if you can figure out what this formula means...

HINT: relevant to "l'appareil-photo de trou d'épingle" [il est en français]

or, if you speak German, "relevant zur Splintlochkamera"



d=1.9\sqrt{f \lambda}
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