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18 Cards in this Set
- Front
- Back
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thomas young
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proved huygens theory of light waves
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thomas edison
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invented the light bulb in america
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how do manufactors increase bulb brightness?
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use a larger filament
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when was the lightbulb invented in america?
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1879
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how do we say a light bulb burns out? what happens?
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it broke; filement wears out
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why do we see different colors in soap bubles and oil slicks?
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when light passes through it separates and you can see the different colors
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how much larger should a key light be from a fill light?
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twice as large
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what is meant by "ligth measures 5 candles"?
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standard form of measurement used to explain light volume
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what three colors allow you to make all colors?
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red, green, and blue
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how does light travel
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in waves
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albert einstein
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explained light was made up of a stream of energy packets called photons (photoelectric effect)
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christian huygen
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proposed light acted like a wave instead of a stream of particles
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sir isaac newton
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first person to show white light is a mix of all the colors
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4 things happen when light hits an object? explain?
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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 |
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what is frequency?
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number of waves passing a point during a time interveral
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what colors does white light contain?
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all the colros of the visible spectrum
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how fast can light travel in a vacum?
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300,000 kilometers/186,000 miles per second
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what is the electromagnetic spectrum?
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shows the sizes, frequencies, and energies of light waves
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