Fresnel number en · NOUN
Etymology
Named after the physicist Augustin-Jean Fresnel.
Meanings
- 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.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| Fresnel numbers | Number=Plur | lexicographic |