Properties of light
The speed of which light travels in
What is 3x108?
The EM spectrum arranges waves based on wavelength and this.
The metal filament heated in incandescent light bulbs
What is tungsten (W)?
The type of light created during chemical reactions, like in glow sticks.
What is chemiluminescence
Light produced when an electric current passes through an inert gas such as neon.
What is electric discharge?
The principle that states light takes the shortest path
What is the Fermat principle?
The only portion of the EM spectrum humans can see.
What is visible light?
In incandescent bulbs, 95% of the energy becomes this.
What is heat?
This light source stores energy and slowly re-emits it.
What is phosphorescent light?
Chemical that glows when it reacts with iron
What is luminol?
Light acts as both a wave and this
What is a particle?
This type of electromagnetic wave has the longest wavelength in the entire spectrum.
What are radio waves?
The vapour inside fluorescent lights that reacts with electric current.
What is mercury vapor?
Fireflies can create this light
What is bioluminescence?
The color of the light depends on this
What is the inert gas used?
The type of path light travels in
What is a straight line?
The second most energetic wavelength
What are X-rays?
The white powder inside fluorescent tubes that glows when hit by UV light.
What is phosphor?
LED's are this efficient
Which type of light is 45% efficient?
What is nitrogen?
These waves allow light to move through empty space without a medium.
What are electromagnetic waves?
What is infrared light?
The type of bulb that is 20% efficient
What is a fluorescent light bulb?
creates light by electroluminescence in a semiconductor material.
What are LED's
Glows red when electric discharge passes through
What happens if you use Neon as the inert gas