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luminous eg. lamp
source of light energy
non-luminous eg. desk, moon, mirror
reflects light
incandescence eg. traditional light bulbs, kerosene fuel lamp
light that is emitted for a high temperature source
wire part of light bulb
tungsten filament
phosphorescence eg. glow in the dark
phosphors absorb light energy
electric discharge eg. neon light signs
electricity passes through a gas filled tube
fluorescence eg. tube lights in classroom
phospher coating mecury vapors creates UV energy
Chemiluminescence eg. glow sticks
mixing of chemicals
bioluminescence eg. jelly fish, eel, firefly
occurs naturally in certain plant and animals
translucent
allow some light through
opaque
allow no light to pass through
transparent
allow all light to pass through
Visible Spectrum
ROYGBIV
When white light passes through ____ you get ROYGBIV
Spectrum
Who discovered ROYGBIV?
Isaac Newton in 1666
Electromagnetic spectrum
range of radiant energies (measured in waves)
top point of wave
crest
lowest point of wave
trough
waves is measured in
hertz (Hz)
High Frequency
lots of waves
low frequency
less waves
Author
valerie_hsu
ID
16201
Card Set
Science
Description
Light
Updated
2010-04-26T04:16:30Z
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