testing without nuclear explosion
The knowledge explosion came about when people realised that two plus two equal four. It changed when they discovered that two times two equal four too.
The only nuclear explosions in Japan were the two in WW2, on Hiroshima and Nagasaki.However I believe you meant the Japanese nuclear reactorexplosion, which was not a nuclear explosion it was either a steam explosion and/or a hydrogen/oxygen chemical explosion. That occurred at Fukushima.
Francis meant that knowledge isn't easy to get. He was recognizing and appreciating how knowledge is very powerful.
A very basic knowledge about some subject.
Perfect knowledge means that the customers know the past, present and the future status of the market.
That question doesnt make any sense. If you meant, "Is knowledge necessary to have wisdom?" the answer is yes. Wisdom is having knowledge and the judgment necessary to make a good decision.
the explosion = die Explosion.
It is about doing research with honesty and conclude with the best of the knowledge researcher had.
Meant to further your (or their) knowledge. For learning. (If you didn't understand my first sentence)
The explosion raises a dust cloud on the surface, that might be what you see early on. Afterwards the ground subsides into the collapsing explosion cavity. But this typically takes minutes, so I don't think thats what you meant.
Inlightening is not a word. If you meant enlightening, it means: tending to increase knowledge or dissipate ignorance.