Page 13 - GENERAL PHYSICS 1 DICTIONARY

WATT- A derived unit of power in the International System of X-RAY- high- energy photons; high- frequency, short-
Units (SI) defined as one joule per second. The watt measures wavelength electromagnetic waves.
the rate of energy conversion or transfer. X-RAY DIFFRACTION- A complicated technique using x-rays to

WAVE- A disturbance or oscillation that travels through "create an image" where no lense to focus the light rays is
spacetime accompanied by a transfer of energy. available.
WAVELENGTH- A measure of the distance traversed by a single X-RAY IMAGES- Images such as photographs or computer
spatial period of a sinusoidal wave, i.e. the distance over which enhanced images produced by bombarding a target with x-rays.
the wave's shape repeats.
WEDGE- A triangular round tool in the form a compound and
portable inclined plane; one of six classical simple machines.
WHEEL AND AXLE - A wheel attached to an axle so that these
two parts rotate together in which a force is transferred from
one to the other; one of six classical simple machines.
WHITE BODY- A hypothetical idealized physical body that
reflects all incident electromagnetic radiation completely and
uniformly in all directions; the opposite of a black body.

WIND- The flow of gases on a large scale.
WIND SHEAR- A difference in wind speed and direction over a
relatively short distance in the atmosphere. Wind shear can be

broken down into vertical and horizontal components, with
horizontal wind shear seen across fronts and near the coast,
and vertical shear typically near the surface, though also at
higher levels in the atmosphere.