Great gift for chem students
I have bought a set for everyone of my chemistry students in the last 5 years. We use these to talk about waves and light when we introduce electrons. They use these to look at light from flame test labs as well as the gas discharge tubes. I tell them to take these home and watch fireworks with it. This may be the last year of giving them out, but I will have several pairs for students to use in the same unit of study.