In this activity, students use a UV light-emitting diode pen to write secret messages and investigate a range of objects to see if or how they fluoresce.
By the end of this activity, students should be able to:
- explain why an invisible dye fluoresces when UVA shines on it
- use UV light to investigate objects to see if and how they fluoresce.
Download the Word file (see link below) for:
- introduction/background notes
- what you need
- what to do.