Re: In optics, an aperture is a hole or an opening through which light travels

by Огурцофф [76 Views] 2010-05-07 16:34:18
In response to: In optics, an aperture is a hole or an opening through which light travels by Штирлиц, 2010-05-07 16:30:34

ну а я что говорю?
как на дырке может быть грязь?
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