The next time you get caught in the rain, thank your eyelashes for keeping your vision clearly.
Experiments with human eyelashes and fibers imitating eyelashes show some traits that help water The advances of science.
The outside of a eyelash, or cuticle, acts as a “micro-case”, the researchers report. Water can flow easily from root to top, but not in the opposite direction, thanks to scales that overlap as herpes on a roof. When scientists plunged loose eyelashes into the water and brought them back, more strength was required to move the eyelashes when the water was working against the turn than when it went with it. And by dripping water in loose eyelashes, the researchers showed that the hairs are hydrophobic, which means that water beads on them and tend to roll.
The circles approximate a form called a Brachistochrone, a curve that minimizes the time it takes to get from point A to B under the force of gravity. Using nylon fiber strings with similar dimensions and elasticity like eyelashes, researchers compared fibers in the form of a brachistochron with fibers that were straight or curved in another form. The points slipped faster from Brachistochron.
Known to save from dust, eyelashes are not known for their water breakdown superpower (Sn: 2/24/15). In addition to helping in a rainstorm, the effect can enter the game when the bath, sweat or cries. Beauty treatments can be kidnapped with this ability, however. The mascara can make the eyelashes pull water instead of repeating it, scientists notice and curling the lashes changes their shape.
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Image Source : www.sciencenews.org