Activity Overview
In this activity, students will use a light probe to measure the light intensities of light bulbs with different wattage ratings.
Before the Activity
Install the CBL/CBR Application on the students' graphing calculators using TI Connect™ or a TI-GRAPH LINK™ Connect the TI-73 to the CBL 2™ unit Connect the light probe to the CH1 port of the CBL See the attached PDF file for detailed instructions for this activity Print pages 151 - 159 from the attached PDF file for your class
During the Activity
Distribute the pages to your class.
Follow the Activity procedures:
Set up the light probe, 1 meter away, in level with the center of the light bulb
Switch on the bulb and collect the readings for light intensity
Repeat the experiment for the remaining bulbs
Plot a graph of light intensity versus wattage and determine the relationship between the two variables by doing a Manual-Fit calculation
After the Activity
Students will complete the Data Collection and Analysis Sheet and answer the questions listed in it.
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary