Physics Test #1 Flashcards
The electromagnetic Spectrum
-Radio -longest wave length
-Microwave
-Infread
-Visible
-Ultraviolet
-X-ray
-Gamma ray- shortest wave length but highest frequency
what is incandescence
when light is produced from heat
-Waste a-lot of energy
example: fire
what is electric discharge
When you run electricity through a noble gas it produces light
-Neon signs (opening signs)
what is phosphorescence
The production of light by absorbing ultraviolet light and slowing emitting it as visible light
-glow in the dark
what is fluorescence
The production of light by absorbing ultraviolet light and immediately emitting it as visible light
-highlighter
what is chemiluminescence
Production of light through a chemical reaction
-glow sticks
what is bioluminescence
Chemiluminescence but inside a living organism
-Fire fly
what is triboluminescence
production of light by rubbing certain crystals together
-life savers
What is light emitting diode
the production of light as a result if passing on electric current through a semiconductor
-LED light
what is a laser
producing light and focusing to a narrow point using many mirrors
-Laser
radio waves uses
-Tv signals
-cellphone communication
-AM/FM radio
microwaves uses
-microwave ovens
-telecommunications
infared light uses
-remote controls
-keep food warm
visible light uses
-rainbows
-human vision
ultraviolet uses
-causes skin to tan and burn
-increases skin cancer
x-rays uses
-medical imaging
-cancer treatment
gamma rays uses
-cancer treatment
are most object luminous or non-luminous
non-luminous
what is the speed of light
3.0x 108 mls
