Iridescent Universal Indicator

May 10, 2019

Have you ever wondered about how you can recreate a rainbow inside a big glass tube, but you don't know how and are afraid that it's too dangerous to mess with the laws of optics?

 

Physicist Steve Mould shows you how to produce one with a universal indicator. (Warning: Sodium hydroxide is a dangerous chemical & should not be handled by anyone unauthorised.)

 

Drop acid and see rainbows

 

 

 

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