The inverse square law is revealed when your class participates in this activity. They move a graph paper or perfboard square back and forth in a square of light to see how the intensity changes. You will definitely want to add this illuminating activity to your collection of physics demonstrations.

Concepts

light intensity, light, inverse square law

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Additional Tags

inverse square law, light intensity, science

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Pros

• Few materials yield intense learning outcomes
• An explanation of concepts accompanies the procedure

Cons

• None