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Can Humans See Polarized Light

Though most of us are unaware of our capacity to do so, humans can also perceive the polarization of light. We detect the orientation of polarized light using ’Haidinger’s brushes’, an entoptic visual phenomenon described by Wilhelm Karl von Haidinger in 1844 [2]. [ pō′lə-rīzd′ ] Save This Word! n.… 

Can You Stack Table Saw Blades

Many small- to medium-size table saws have relatively short arbors that do not safely accommodate a full stacked dado blade set. This isn’t a problem when using a single saw blade, but when trying to use a 3/4-inch stacked dado blade, there isn’t enough thread to allow the nut to…