Here is a bit more information on fresnel lenses from wikipedia:
A Fresnel lens (pronounced /freɪˈnɛl/ fray-nel or /ˈfrɛznəl/ frez-nel) is a type of compact lens originally developed by FrenchphysicistAugustin-Jean Fresnel for lighthouses.[1]
The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. A Fresnel lens can capture more oblique light from a light source, thus allowing the light from a lighthouse equipped with one to be visible over greater distances.
We hope you enjoy the video and don’t try this at home!
Probably one of the worst things you can do. Is breath that stuff. It’s a neuro toxin