Rupert Murdoch is the leader of an organization.
A Fresnel lens -LRB- -LSB- freɪˈnɛl -RSB- or -LSB- ` frɛznəl -RSB- -RRB- is a type of compact lens originally developed by French physicist Augustin-Jean Fresnel for lighthouses .. lens. lens ( optics ). French physicist. French physicist. Augustin-Jean Fresnel. Augustin-Jean Fresnel. 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 .. lens. lens ( optics ). aperture. aperture. focal length. focal length. A Fresnel lens can be made much thinner than a comparable conventional lens , in some cases taking the form of a flat sheet .. lens. lens ( optics ). 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 .. lens. lens ( optics ). lighthouse. lighthouse