watt The unit of electrical power,
defined as the power dissipated by 1 ampere of current flowing through 1 ohm of
resistance.
wavelength The distance
between successive cycles of a periodic wave.
widescreen A video display
or projected image with an aspect ratio wider than 1.33. Widescreen TV shave an
aspect ratio of 1.78, also expressed as “16:9.”
windowbox A video image
that results from displaying an image of standard (1.33) aspect ratio on a television
set of widescreen (1.78) aspect ratio. The picture is presented between black
bars to the left and right sides of the image. Contrast with “letterbox.”