The Action Lab experiment

[Nate]

One of the youtubers I watch newest video deals with an interesting UV experiment. The interesting part starts at the 3:50 mark. At the 4:35 mark is some questionable non information about UV safety, but still interesting. I think he's smart enough to use protection as he is or was a teacher.

 

 

[Andy Perrin]

Yeah, it’s quite cool. Stefano showed the photo bleaching effect or a related one on the other end of the spectrum I think some time ago. 

[Stefano]