On Fri, Mar 4, 2011 at 5:23 PM, Be Positive <mc100400148@vu.edu.pk> wrote:
--World's Biggest Mirror
We all see are faces in the mirror every day… but imagine that you can see your car, house, or even a building!!! The world's largest salt flat, the Salar de Uyuni in Southwestern Bolivia, is one of the most exotic place scenes on earth. Due to its large size, smooth surface, high surface reflectivity when covered with shallow water, and minimal elevation deviation, Salar de Uyuni makes an ideal target for the testing and calibration of remote sensing instruments on orbiting satellites used to study the Earth.
In addition to providing an excellent target surface the skies above Salar de Uyuni are so clear, and the air so dry, that the surface works up to five times better for satellite calibration than using the surface of the ocean.
There is an estimated 10 billion tons of salt in the flats, 25 times the amount in the Bonneville Salt flats in Utah in the United States. The Salar de Uyuni, a sea of salt, a salt desert, was once an inland sea, or giant salt water lake, but the water vanished into the thin dry air of Andean altitude.
All that remains is the salt, tens of meters thick, lying stark beneath bright sky: a sun-bleached skeleton of a dead sea.
Never Green
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--
For study materials, past papers and assignments,
Join VU School at www.VusCool.com
and www.VUGuys.com
CoooL Virtual University Students Google Group.
To post to this group, send email to coool_vu_students@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/coool_vu_students?hl=en
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