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Latest Jimmy Xu Stories

2005-11-21 16:10:00

PROVIDENCE, R.I. -- Since the creation of the first working laser -- a ruby model made in 1960 -- scientists have fashioned these light sources from substances ranging from neon to sapphire. Silicon, however, was not considered a candidate. Its structure would not allow for the proper line-up of electrons needed to get this semiconductor to emit light. Now a trio of Brown University researchers, led by engineering and physics professor Jimmy Xu, has made the impossible...


Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.