One picosecond is equal to 1000 femtoseconds, or 1/1000 nanoseconds. Coulomb explosions for industrial machining are made with ultra-short (picosecond or femtoseconds) laser pulses. These devices generate ultrashort, ultra-high-intensity pulses with a duration of 20 to 100 femtoseconds. Some of her lasers can generate pulses of less than 12 femtoseconds. The duration of the light pulses can be less than 100 femtoseconds. The time-resolution of the best optoelectronic streak cameras is around 180 femtoseconds. However, the transparent state lasted for only 40 femtoseconds, until electrons returned to the material.