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Inverse Variation Practice 2 - Visualizing Algebra

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    Let's try another problem on inverse variation using light. The intensity of
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    light varies inveresely as a square of the distance from the source. So think
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    about if we shine the light unto a screen. This screen would have a light spot
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    on it and this would be the intnsity of light on the screen. We measure this
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    intensity on whats called a foot candle, so if a light source is 5 feet from a
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    screen There will be an intensity of 2 foot candles knowing this let's find the
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    intensity on the screen if this light source was moved to 20 feet away. Now you
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    might never have heard of a foot candle before but just know that foot candle is
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    a way that we can measure intensity. Look this up if you want to learn more
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    about light and foot candles. Distance here is just measured in feet, so 5 feet
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    would be a distance, as would 20 feet. So try to figure this problem out and
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    remember that the intensity of light is varying inversely with the square of the
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    distance. Think carefully about the proportion you need to setup and when you're
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    ready put your answer here.
Cím:
Inverse Variation Practice 2 - Visualizing Algebra
Video Language:
English
Team:
Udacity
Projekt:
MA006 - Visualizing Algebra
Duration:
01:03
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