Learn with us online while the Exploratorium is temporarily closed. You can help us reopen—donate today.
Fluorescent Tube
Powder inside a fluorescent tube makes invisible light visible.
Where: This exhibit is not currently on view.
Inverse Square Law
Light gets dimmer the farther it travels–and a bit of simple math explains how.
Sun Painting
Created by artist Bob Miller, this classic Exploratorium exhibit is a “live” painting that uses light from the Sun as its palette.
What's Hot, What's Not?
At this exhibit, an infrared camera detects the heat radiating from warm objects and projects it on a big screen, allowing you to see what’s hot (and not) about you and the other people and objects in your surroundings.
Where: Crossroads: Getting Started
