Gunpowder explosion. Gunpowder exploding in a ball of metal gauze. Gunpowder was known in China by the 10th century AD. It is a mixture of 75% potassium nitrate,15% charcoal and 10% sulphur. It burns very rapidly,and the gases produced cause an increase in pressure leading to explosion | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lawry, Lawrence |
Taille de l’image : | 3100 px × 4577 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |