Lightboxes

Image 1 of 1
RADIUM: LUMINOUS (GLOW-IN-THE-DARK) WATCH (2 of 2)<br />
Phosphorescence A Form Of Luminescence<br />
(Viewed in Darkness) The hands & numbers contain minute amounts of radium salt. The radioactive decay of radium causes the watch to glow in the dark. Phosphorescence is luminescence which continues after the radiation causing it ceases.

Fphoto-26969005B-2RM.jpg

RADIUM: LUMINOUS (GLOW-IN-THE-DARK) WATCH (2 of 2)
Phosphorescence A Form Of Luminescence
(Viewed in Darkness) The hands & numbers contain minute amounts of radium salt. The radioactive decay of radium causes the watch to glow in the dark. Phosphorescence is luminescence which continues after the radiation causing it ceases.

Copyright:© 1990 Richard Megna - Fundamental Photographs

Search for Keywords:

dial
glow
hour
luminiscence
luminosity
luminous
minute
phosphor
phosphorescence
radioactivity
radium
science
second
sequence
series
square
time
timepiece
watch
watchface
richard megna