| Light Up My Life: Page 5 |
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 c) How much butter will each piece of toast receive at 4 ft? 5 ft?
- d) Which mathematical relationship, y =1/x or y = 1/x2, best matches the way the butter gun works?
- 8. Compare your graphs of illuminance versus distance for the candle and the light bulb to the graphs of y = 1/x and y = 1/x2.
- a) Which, if either, mathematical relationship, y = 1/x or y = 1/x2, better matches the relationship between illuminance and distance? Explain your answer.
- b) Complete this statement in your log: "As the distance from a concentrated source of light increases, the illuminance provided by the source..."
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