Heating wood with a Fresnel lens

Référence de la vidéo 12081093
Heating wood with a Fresnel lens. Footage of sunlight being focused onto a piece of wood with sufficient power to cause the wood to burn. The sheet of wood placed in the beam by the demonstrator shows how the square beam narrows to a focal point, concentrating the sunlight. Fresnel lenses have a structure that allows them to be made much thinner and larger than conventional lenses. One application of Fresnel lenses is for solar power, as they can concentrate sunlight onto solar cells in a ratio of 500:1.
Licence : Droits gérés
Crédit : Science Photo Library / RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA
Model Release : Non requis
Durée : 51 Secondes
Aspect ratio : 16/9
Restrictions : -

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