A
unit of energy (1 watt-second) used to describe the rate of
energy delivery. It is equal to 1 watt-second or 0.239 calorie.
Joule/cm2
A
unit of radiant exposure used in measuring the amount of energy
incident upon a unit area.
Judas
Optic
A
small defocused Galilean telescope mounted in a hole in a
door. Viewed from inside, a wide-angle view of the outside
is seen; viewed from outside, the field is narrow, and the
image is extremely out of focus.
