- contact-electricity, the most
electropositive metals giving the
largest photo-
electric effect. In 1887,
Heinrich Hertz observed the
photoelectric effect and...
-
electrons move
toward the
first dynode because they are
accelerated by the
electric field. They each
arrive with ≈100 eV
kinetic energy imparted by the potential...
-
primarily intended to
blind humans but was also
reported to
damage the
photo-
electric elements in
laser rangefinders,
videocameras and
missile s****ers. Roughly...
- A
light curtain is a
safety device that
detects when a beam of
infrared light has been
broken by a
person p****ing
through an area.
Light curtains, now...
-
Richard Sewall (December 1948). "Accuracy,
Precision and
Stability of New
Photo-
electric Color-Difference Meter". JOSA. 38 (12): 1094. (Proceedings of the Thirty-Third...
- so, they
employ a
meter administrator who will use
daily data from a
photo-
electric control unit (PECU)
array which is then used to
calculate the energy...
- of Ruth
Snyder in the
electric chair at Sing Sing Prison, on
January 12, 1928, has been
called "the most
famous tabloid photo of the decade". Photographers...
- OCLC 608883548. Dubridge, Lee
Alvin (March 1926). "Variations in the
photo-
electric sensitivity of platinum" (PDF).
Proceedings of the
National Academy...
- by the company.
Before the
widespread adoption of
xerographic copiers,
photo-direct
copies produced by
machines such as Kodak's
Verifax (based on a 1947...
-
diameter geodesic dome
covered with
transparent Mylar, and
shaded by
photo-
electric cells. The
utility core
contained the
manufactured plumbing, utilities...
