26 - From a Distance.pdf - Name Modeling Light Intensity...

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Name :__________________________ Modeling Light Intensity with a Rational Function From a Distance The activity illustrates a natural phenomenon. As you increase the distance from a light source, the perceived intensity of the illumination will decrease. To investigate the phenomenon, we will: Use a CBL to help collect realistic data points Create a scatter plot of the data points Use the data points to determine an algebraic function that models the data Use the algebraic function to answer some questions 1. Use a CBL to help collect data points Set up the CBL to collect data: o Plug the light-sensor in to CH1. o Plug the calculator in to the CBL. o Turn on the calculator. o Set-up the CBL application: Press APPS button. Scroll down to EasyData and press Enter. The calculator should start displaying readings of the light intensity measured by the sensor. Collect Data: o Place a meter stick next to the light sensor. (Either place both on the floor or put two level desks together) o Adjust the flashlight so you have a fine beam.
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