The First Millisecond Of A Nuclear Explosion: Photo From Tests Performed in Nevada 1952
Fascinating to think that even though this is the first millisecond of the explosion, the majority of the nuclear reaction powering the explosion has already been over for much of that millisecond. All the 'work' takes place over just 5-10 microseconds, the next 990 microseconds until this picture is taken are just coasting.












