The astronomy enthusiasts often have a green laser, but few of them use this tool to test the quality of olive oil!
Those who try the experiment noticed a yellow beam appeared from the other side of the bottle, this is due to the fluorescence:
The molecules of Olive Oil absorb photons of light green and high energy re-emit as yellow light photons which are lower in energy.
The strangest thing is that most of the Extra virgin olive oil will be good over the beam will have a red or orange color.
Olive oil has a refractive index of 1.47, while the water was only a 1.33. Here is a quick test to determine the quality of the Extra virgin olive oil you have at home you.
If you have a beam of red light on the other side of your bottle of olive oil is that it is Extra virgin high quality.