Speakur

Word Pronunciation & Dictionary

fresnel number

Word Rarity Very rare

Frequency: Zipf frequency 2.42 in modern English

Syllables
fres-nel num-ber
IPA
20
Scrabble Score
13
Letters
3
Syllables
9
Unique Chars

Meaning

noun

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.

Etymology

Named after the physicist Augustin-Jean Fresnel.

Inflected Forms

Fresnel numbers (plural)

Questions

What does fresnel number mean?
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.
Where does fresnel number come from?
Named after the physicist Augustin-Jean Fresnel.

How to pronounce fresnel number

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