This lab uses the light sensor to plot brightness as a function of distance from a light source. The purpose is to demonstrate the inverse-square relationship quantitatively. Includes a discussion of units.
Student Objectives
- Become familiar with units which describe the brightness or intensity of a light source
- Measure the brightness of a point source as a function of distance
- Prepare a graph to analyze the relationship mathematically
- Compare the experimental plot to a predicted inverse-square graph
- Examine the experimental set up and suggest possible improvements