Light Intensity

The Light Intensity Concept Builder is a tool that allows the learner to predict the effect of varying light bulb power and varying surface-bulb separation distance upon the illuminance upon a surface. There are 12 different situations to analyze and three activities. Each situation requires that the learner use proportional reasoning and the relationship between illuminance and light bulb power and distance in order to determine the illuminance that would result when one or more of these variables is altered. Question-specific help is provided for each of the 12 situations. Use of this Concept Builder with our Task Tracker system allows teachers to track student progress.

Launch Concept Builder

Users are encouraged to open the Concept Builder and explore. There is no need for an activity sheet for this Concept Builder. However, the 12 different groups of questions can be printed. View Questions (For Teachers Only).

Learners and Instructors may also be interested in viewing the accompanying Notes page. Technical information, teaching suggestions, and related resources that complement this Concept Builder are provided on the Notes page. View Notes.

And finally, we now offer a short (3-minute video) tailored to the Concept Builder: