sentence: More light can pass through.
sentences_before: The design allows the construction of lenses of large aperture and short focal length without the weight and volume of material that would be required in conventional lens design. Compared to earlier lenses, the Fresnel lens is much thinner.
sentences_after: Lighthouses that use these kind of lenses can be seen from farther away.
concept_name: light
headings: Fresnel lens
categories: Physics