free worksheets » English Hungarian uc French Malay uc Romanian Bulgarian Dutch Arabic Mandarin »
« Chinese TC Urdu Russian Chinese SC Italian German Spanish Turkish Polish « Cantonese
Project HappyChild  has 16 areas 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 click any area to access

just click here

3D gridbuilding - science

3D GRIDBUILDING - SCIENCE - PHYSICS

FLUORESCENT LAMPS

3D gridbuilding - science

3D gridbuilding - science - biology - chemistry - physics
"FORWARD LINKS" go to factors that "fluorescent lamps" mentions ...
3D gridbuilding - science - biology - chemistry - physics
... "BACK LINKS" go to pages that mention "fluorescent lamps" (to provide context and more info)
3D gridbuilding - science - biology - chemistry - physics

A-Z sundry physics biology chemistry A-Z Physics A-Z Biology A-Z Chemistry A-Z sundry A-Z

graphic by Corel, Canada




do you have an original graphic we could add here, relating to 'fluorescent lamps'? please see the main Gridbuilding page for details of how to get in touch




do you have an original graphic we could add here, relating to 'fluorescent lamps'? please see the main Gridbuilding page for details of how to get in touch




do you have an original graphic we could add here, relating to 'fluorescent lamps'? please see the main Gridbuilding page for details of how to get in touch




do you have an original graphic we could add here, relating to 'fluorescent lamps'? please see the main Gridbuilding page for details of how to get in touch




do you have an original graphic we could add here, relating to 'fluorescent lamps'? please see the main Gridbuilding page for details of how to get in touch




Fluorescent lamps are lamps which use the effect of electricity on Mercury vapour within an enclosed glass tube or bulb to produce light.


The tube contains two electrodes, one at each end, and is filled with an inert gas - usually Argon. The inside of the tube is coated with a phosphorescent substance, and it also contains a small blob of Mercury.


When a fluorescent lamp is switched on, as long as there is a sufficient potential difference, an electrical current will flow between the electrodes. As the electrons which make up the current move, they have sufficient energy to vaporise some of the Mercury.


Collisions between the electrons and the now-gaseous Mercury atoms cause electrons within the Mercury to "jump" momentarily to a different place in the atomic structure, but they cannot maintain this position and so "fall" back down, emitting the extra energy as photons of UV light, which is absorbed by the phosphorescent material on the walls of the tube/bulb, and re-emitted as visible light.


Fluorescent lamps thus operate differently from filament lamps, halogen lamps, or LEDs: their main advantage is that they are much cooler in operation, because the electrical energy supplied is mostly converted into visible light, not heat.



Anne Evans



~   FORWARD LINKS   ~
absorption
acronyms
advantages
Argon
atomic
atomic
structure
atoms
blob
bulbs
cause
coat
collision
colour
contain
conversion
cool
current
difference
effects
electrical
electrical
current
electrical
energy
electricity
electrodes
electrons
emission
enclose
end
energy
fall
filament
fill
flow
fluorescent
FLUORESCENT
LAMPS
gases
glass
halogen lamps
halogens
heat
inert
jump
lamps
LEDs
light
location
long
maintenance
make
material
Mercury
movement
operation
pd
phosphorescence
photons
place
position
potential
potential
difference
production
small
structure
substance
sufficient
supply
switch
tubes
ultra-violet
use
UV
vaporise
vapour
violet
visibility
visible light
walls
~   FORWARD LINKS   ~
BACK LINKS
filament lamp
FLUORESCENT LAMPS
halogen lamps
LEDs
BACK LINKS

A-Z sundry physics biology chemistry A-Z Physics A-Z Biology A-Z Chemistry A-Z sundry A-Z

3D gridbuilding - science - biology - chemistry - physics
"FORWARD LINKS" go to factors that "fluorescent lamps" mentions ...
3D gridbuilding - science - biology - chemistry - physics
... "BACK LINKS" go to pages that mention "fluorescent lamps" (to provide context and more info)
3D gridbuilding - science - biology - chemistry - physics

The Web address for this page is http://www.happychild.org.uk/gridbuilding/physics/fluorescentlamps/index.htm

visit the garden wall at Sunshine City copyright about us visits since 4th March 1998:

Design and layout of all pages at FREEWAY © Penny Midas Rollo 2000-2018 [disclaimer]. World rights reserved.