Excellent, Andrew. Many thanks.
John.
Andrew L Wendelborn wrote:
Magicubes:
The light comes from a chemical combustion within the cube's
bulbs. Each of the four bulbs contains several inches of wire
made of zirconium, a flammable metal used in nuclear reactors.
This wire floats unattached in an atmosphere of pure oxygen.
When the shutter clicks, it raises a small plastic stick that
relases a spring inside the magicube. The spring, in turn,
strikes a metal anvil in the cube's base. Friction from this
impact ignites the phosphorous coating on the anvil and sets the
zirconium on fire. Oxygen fuels the flame immediately, producing
a flash of white light. Within only 25-thousandths of a second,
the flash is over. The blue coating on the cube filters the
flash's light so that it simulates normal daylight.
Zirconium has a melting point of 1750`C. NEVER touch the
cube as the flash is being set off.
at this (slightly weird) site:
http://www.csonline.net/bpaddock/mra/mra4wk.htm
Interesting.
Andrew
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