Synonym of Fresnel's rhomb

plural of Fresnel rhomb

The reflection of light predicted by the Fresnel equations.

plural of Fresnel reflection

Synonym of Arago spot

plural of Fresnel spot

plural of Fresnel number

(optics) A dimensionless quantity (denoted F), such that for an electromagnetic wave passing through an aperture and hitting a screen, F=(a²)/(L𝜆) where a is the characteristic size (e.g. radius) of the aperture, L is the distance of the screen from the aperture, and 𝜆 is the incident wavelength.

(physics) An optical device that uses diffraction through alternate transparent and opaque rings to function as a lens

plural of Fresnel zone plate