Transcript Light Vocabulary

Light Vocabulary
Unit C
Pages 73-99

The part of the EM spectrum that the
human eye can see.
Visible Light (84, C)

An electromagnetic wave is a disturbance
that transfers energy through a field.
EM Wave (73, C)

A tool that uses refraction to separate the
different wavelengths that make up white
light.
Prism (97, C)

Three colors of light, which can be mixed
to produce all possible colors. When all
three are mixed together equally, they
appear white or colorless.
Primary Colors (98, C)
(Red, Green, and Blue)

EM frequencies between microwaves and
visible light. It is often associated with
heat/cooking. Example: in a toaster
Infrared Light (84, C)

EM waves with shorter wavelengths,
higher frequencies, and higher energy
then other radio waves. These waves are
used in cell phones.
Microwaves (83, C)

The electromagnetic spectrum is a
gradual progression from the lowest
frequencies (radio waves), to the highest
(gamma rays).
EM Spectrum (80, C)

EM waves that have the longest
wavelengths, the lowest frequencies, and
the lowest energies. These waves
broadcast TV.
Radio Waves (82, C)

X-rays pass easily through the soft tissues
of the body, but many are filtered out by
denser matter such as bone.
X-Rays (86, C)

The passage of an EM wave through the
medium (any object a wave goes
through).
Transmission (93, C)

The disappearance of an EM wave into
the medium (any object a wave goes
through).
Absorption (93, C)

Part of the EM spectrum consists of
frequencies above those of visible light
and below those of x-rays. They can
damage tissue, skin, and your eyes.
Ultraviolet or UV Light (85, C)

Spreading out of light rays in all
directions, because particles reflect and
absorb light.
Scattering (95, C)

The production of light by materials at
high temperatures. When a material
gets hot enough, it gives off light by
glowing or bursting into flames.
Incandescence (89, C)

The production of light by living
organisms. These organisms produce
light from chemical reactions rather than
intense heat.
Bioluminescence (89, C)