http://www.vidoemo.com/yvideo....ince-rupert-s-drops=


I would love to see one of these "blow up" at supper slow speed.

the basic idea is very simple you melt a clump of glass and drop it into a bucket of ice water.

the out side cools rapidly and compresses the inside causing the "fat" end to be very very strong

but if you break the tail it creates a fault across the surface and pops like a balloon (full of glass)

anyone?

I recently found this

Recently an examination of the shattering of Prince Rupert's Drops by the use of extremely high speed video[2] done by Dr. Srinivasan Chandrasekar at Purdue University has revealed that the "crack front" which is initiated at the tail end, propagates in a disintegrating drop within the tensile zone towards the drop's head at a very high velocity (~ 1450-1900 m/s, or up to ~4,200 miles per hour).