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18 Cards in this Set

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  • Back
thomas young
proved huygens theory of light waves
thomas edison
invented the light bulb in america
how do manufactors increase bulb brightness?
use a larger filament
when was the lightbulb invented in america?
1879
how do we say a light bulb burns out? what happens?
it broke; filement wears out
why do we see different colors in soap bubles and oil slicks?
when light passes through it separates and you can see the different colors
how much larger should a key light be from a fill light?
twice as large
what is meant by "ligth measures 5 candles"?
standard form of measurement used to explain light volume
what three colors allow you to make all colors?
red, green, and blue
how does light travel
in waves
albert einstein
explained light was made up of a stream of energy packets called photons (photoelectric effect)
christian huygen
proposed light acted like a wave instead of a stream of particles
sir isaac newton
first person to show white light is a mix of all the colors
4 things happen when light hits an object? explain?
1.waves reflected or scatered so it appears shiny
2.waves absorbed by object to look dark or opaque
3.refracted through the object
4.waves pass through the object with no effect causing it to be transparent
what is frequency?
number of waves passing a point during a time interveral
what colors does white light contain?
all the colros of the visible spectrum
how fast can light travel in a vacum?
300,000 kilometers/186,000 miles per second
what is the electromagnetic spectrum?
shows the sizes, frequencies, and energies of light waves