This rise is due to the inward pull of surface tension acting on the surface which pushes the liquid into the capillary tube. It is because of the same reason that oil rises into the Wick of an oil lamp or water below the surface of the earth rises in the plant or ink in a blotting paper.
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This rise is due to the inward pull of surface tension acting on the surface which pushes the liquid into the capillary tube. It is because of the same reason that oil rises into the Wick of an oil lamp or water below the surface of the earth rises in the plant or ink in a blotting paper.