Fresnel can refer to physicist Augustin-Jean Fresnel, or to the following topics associated with him:

Fresnel lens, an efficient lens originally developed for lighthouses

Fresnel drag coefficient, a parameter used in early attempts to explain to constant speed of light

Huygens-Fresnel principle, a description of wave propagation

Fresnel diffraction (or Fresnel pattern), describing wave propagation through an aperture

Fresnel equations, describing light reflection and refraction

Fresnel lantern, a theatre spotlight incorporating a Fresnel lens

Fresnel zone plate, a plate which focuses light by Fresnel diffraction

Fresnel diffraction mirror, an atomic mirror utilizing Fresnel diffraction

Fresnel zone, a pattern of radiation resulting from Fresnel diffraction

Fresnel integral, functions related to Fresnel diffraction

Fresnel rhomb, a plate that circularly polarizes light

Hyperradiant Fresnel lens, a now-obsolete very large Fresnel lens

Fresnel number, a dimensionless parameter in diffraction theory

Fresnel (unit of frequency), a formerly-used unit equal to one terahertz.

Rimae Fresnel, an escarpment on the moon