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I
want a pair of these.
An X-ray (or Röntgen
ray) is a form of electromagnetic radiation with a wavelength
in the range of 10 to 0.01 nanometers, corresponding to
frequencies in the range 30 PHz to 30 EHz. X-rays are
primarily used for diagnostic radiography and crystallography.
X-rays are a form of ionizing radiation and as such can
be dangerous. In many languages it is called Röntgen
radiation after one of the first investigators of the
X-rays, Wilhelm Conrad Röntgen.
X-rays cause fluorescence in most materials, and these
emissions can be analyzed to determine the chemical elements
of an imaged object. Another use is to generate diffraction
patterns, a process used in X-ray crystallography. By
analyzing the internal reflections of a diffraction pattern
(usually with a computer program), the three-dimensional
structure of a crystal can be determined down to the placement
of individual atoms within its molecules. X-ray microscopes
are sometimes used for these analyses because the samples
are too small to be analyzed in any other way.
Goggles (ie- safety glasses) are forms of protective eyewear
that usually enclose or protect the eye area in order
to prevent particulates or chemicals from striking the
eyes. They are used in chemistry laboratories and in woodworking.
They are often used in snow sports as well, and in swimming.
Goggles are often worn when using power tools such as
drills or chainsaws to prevent flying particles from damaging
the eyes. Many types of goggles are available as prescription
goggles for those with vision problems... |
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