Blue colored water moves up a capillary tube demonstrating capillary action caused by adhesion between the polar water molecules and the glass which is also polar. The demonstration also reveals the effects of cohesion - the attraction between water molecules that causes them to stick together. The blue is from food colouring added to enhance the visual of the water in the tube | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Shields, Martin |
Taille de l’image : | 5040 px × 3330 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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