Integrated circuit (IC)
Light-emitting diode (LED)
Random-access memory (RAM)
Read-only memory (ROM)
DEFINITION OF UNUSUAL TERMS (cont)
A mirror assembly that can be moved to one or more
A radiating body whose spectral emissivity remains the
same at all wavelengths.
It is a constant ratio of less
than unity to the ratio of a black-body radiator at the
In a television system, a scale of brightness values
ranging from maximum to minimum.
A form of electromagnetic radiation similar to visible
light and radio waves.
It is generated by thermal
agitation and radiated by everything with a temperature
above absolute zero (-273°C). High temperatures
increase the thermal agitation.
Hence, the hotter the
object, the greater the infrared radiation.
A small package with electrical terminals, containing a
chip of silicon.
The surface of the silicon is
processed to form hundreds or thousands of transistors
and other devices.
A device for transforming incoherent light of various
frequencies of vibration into a very narrow, intense
beam of coherent light.
A sort of semiconductor light bulb made of a small
piece of semiconductor material that makes a light when
electric current is passed through it in a particular
An IC chip whose stored data can be read at random. The
data is stored data can be read at random. The data is
stored permanently and cannot be changed.
A memory with a number of storage locations, where
words may be written (stored) or read (recovered) in
any order at random.
A memory unit containing data permanently stored, which
can be read at random.
Two or more things made to happen in a system at the
same time, by means of a common clock signal.
A group of bits or string of bits handled as a unit
usually stored at a certain address in a random-access