Students discover how an ultraviolet (UV) LED can make a fluorescent pattern glow in the dark. Then they learn about how different forms of radiation are related, including ultraviolet, visible and infrared light.
Make a simple circuit with an ultraviolet (UV) LED and two coin batteries, and use it to light up a "secret message." Save the components for a classroom demonstration. See a video and diagrams showing how. Make a chart showing the circuit diagram.
Make a chart labeled Different Forms of Radiation, with the headings "Infrared," "Visible light" and "Ultraviolet." Leave space for additional headings.
Photocopy worksheet and assessment (downloadable at bottom of page).
Per pair of students:
Ultravioloet (UV) LED, two coin batteries
Paper fasteners, tape, hook-up wire, strippers, tape, rubber bands
Fluorescent markers (yellow hi-lighters), cardstock in assorted colors, small boxes