Have you heard of gold nanoparticles? We do a super cool experiment, showing you how to make gold nanoparticles, and looking at what happens when they interact with light. The gold particles turn red, blue, and black!

We also look at what happens when we add salt, something that increases the size of the nanoparticles! What happens when salt is added? Watch to find out! Please like comment, and share this video to get more cool science video suggestions.

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