Search on:
PHOTONS
Descriptors Found:
1
Displaying:
1 .. 1
1 / 1
DeCS
Descriptor
English
:
Photons
Descriptor
Spanish
:
Fotones
Descriptor
Portuguese
:
Fótons
Tree Number:
H01.671.579.404.705
H01.671.606.552.782
H01.671.768.638.578.782
Definition
English
:
Discrete concentrations of
energy
, apparently massless
elementary particles
, that move at the speed of
light
. They are the unit or quantum of electromagnetic
radiation
.
Photons
are emitted when
electrons
move from one
energy
state
to another. (From Hawley's Condensed Chemical
Dictionary
, 11th ed)
Indexing Annotation
English
:
elementary
particles
; IM
History Note
English
:
94; was see RADIATION 1985-1993
Allowable Qualifiers
English
:
adverse effects
classification
diagnostic use
history
therapeutic use
Record Number:
31183
Unique Identifier:
D017785
Occurrence in VHL
:
Similar:
DeCS
SciELO
LILACS
LIS