Using the trace metal reagent and
ultraviolet illumination, the forensic examiner was able to illustrate graphically the pattern of metal contact from the pistol to the hand of the shooter.
There are two kinds of
ultraviolet rays which now reach us from the sun -
ultraviolet type A, which used to be blocked by the ozone layer but now gets through due to its destruction; and
ultraviolet type B, the type of
ultraviolet radiation which has been sunburning and suntanning people for thousands of years.
"The variation of
ultraviolet radiation, especially in the middle and high latitudes is great.
The WHO report, "Global Burden of Disease of Solar
Ultraviolet Radiation," is available from <www.who.int/uv/ publications/solaradgbd/ en>.
"By our calculations, the dust cloud would shield the Earth from
ultraviolet light for an extended period, with it taking about 390 days after impact before enough dust settled that there would be an
ultraviolet level equal to before the impact.
Smith agrees that the changing
ultraviolet light probably has something to do with Eta Carinae's binary nature.
Launched into low Earth orbit on April 28, 2003, GALEX is building upon earlier
ultraviolet forays by surveying most of the sky, imaging hundreds of nearby galaxies and tens of millions of very distant ones in the process.
Particles streaming into the upper atmosphere collide with atoms and molecules there and produce flashes of radiation ranging from
ultraviolet to radio wavelengths.
They suggest that the ultraviolet-bright concentrations of light that have so captivated Schiminovich and other astronomers studying GALEX images aren't star-forming regions at all but merely clouds of gas and dust that reflect
ultraviolet light.
OUR KNOWLEDGE of the
ultraviolet universe remained meager until telescopes could be launched into space, since these short wavelengths of light are largely absorbed by Earth's atmosphere.