Hoarfrost. Crystals of hoarfrost on an ash seed. Hoarfrost forms when condensation falls below zero degrees Celsius. If the air is still,water droplets crystallise around "condensation nuclei" such as dust particles on surfaces. For hoarfrost crystals to form,the surface temperature must also be below freezing point | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Edmaier, Bernhard |
Taille de l’image : | 3746 px × 3733 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |