I was looking around with a 532nm green laser pointer the other day, and found that it was almost totally attenuated when aimed at the red (cheap/fake) nectar in my hummingbird feeder. Further experimentation revealed that orange Gatorade was similarly super-absorbent, while beer was pretty transparent to the green light.
Just bought some Tonda Iblea DOP-certified oil and will be interested to try this! It's subjectively delicious, curious if it's objectively flourescent (and if my everyday supermarket olive oil is not).
https://www.physicscentral.com/experiment/physicsathome/fluo...
I was looking around with a 532nm green laser pointer the other day, and found that it was almost totally attenuated when aimed at the red (cheap/fake) nectar in my hummingbird feeder. Further experimentation revealed that orange Gatorade was similarly super-absorbent, while beer was pretty transparent to the green light.
Just bought some Tonda Iblea DOP-certified oil and will be interested to try this! It's subjectively delicious, curious if it's objectively flourescent (and if my everyday supermarket olive oil is not).