40.6 MB (2.8 MB compressed)
3100 x 4577 pixels
26.2 x 38.9 cm ⏐ 10.3 x 15.3 in (300dpi)
LAWRENCE LAWRY / SCIENCE PHOTO LIBRARY LAWRENCE LAWRY / SCIENCE PHOTO LIBRARY
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.
Model release not required. Property release not required.