why water droplets are wet the glass surface and does not wet lotus leaf
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the outside of the glass of water gets wet because the air directly around the glass cools down , causing some of the water vapours in the air to condense into liquid. the lotus leaf is covered in a rough surface of waxy projections, which causes water to form beads and slide off.
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31
Water droplets wet the glass surface but not the lotus because the lotus leaf has a waxy layer also known as the cuticle. This prevents water from being lost in transpiration and water from getting in
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