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Unit 3: Stars & the Milky Way Galaxy

Light Detection — flash animation

Flux Simulator

Demonstrates the inverse square law of light with a lightbulb and detector.
The lightbulb's intensity and the detector's distance can be adjusted to see how they affect the reading.
There are two bulbs and detectors to allow side-by-side comparisons.

Thanks to:
Astronomy Education at the University of Nebraska-Lincoln