June 30, 2013

HydrophobicIMG_1043 (2)

Photographer: Piero Armando
Summary Author: Piero Armando

The photo above shows a good example of hydrophobicity -- the beading of water on an oily surface, such as a leaf. You can see the peculiarly high contact angle of the dewdrop on the leaf's hydrophobic surface. The ant gives some idea of scale. Note also that the blue sky is reflected in the drop. Water drops act like a simple lens. Photo taken on May 12, 3013, in Vinchio d'Asti, Italy.

Photo Details: Camera Model: Canon EOS 600D; Lens: EF-S18-55mm f/3.5-5.6 IS II; Focal Length: 55mm; Aperture: f/16.0; Exposure Time: 0.0050 s (1/200); ISO equiv: 400; Photoshop used to enhance colors and cropping.