Visible and Invisible Colours on the Edge of the Rainbow—A Remote Formal Activity on Electromagnetic Radiation

We designed a formal activity for high school students to answer the challenge of teaching the physics of electromagnetic waves with an inquiry-based approach. We focused on visible light, UV, near and far-infrared spectrum and on the response of matter to different wavelengths. The activity is inspired and connected to some informal learning aspects presented in one of the theatre performances of the Milan University project ‘The Physics Show’. The activity is structured to be done also remotely, by maintaining an inquiry-based approach. We present and discuss both the didactic path and the possible strategies to train teachers and make them aware of how to drive students through this activity.