Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on Nostr: Doing the EM spectrum intro with younger students. We have a bunch of different ...

Doing the EM spectrum intro with younger students. We have a bunch of different examples for them to explore: radio, microwave, IR, visible light, UV, X-ray and gamma (potassium chloride), and I always volunteer a Royal Bank Of #Scotland £10 note for the UV demo cos the otters are just so damn pretty. I've always got it back.