surface density

American  

noun

Physics.

1. quantity, as of electric charge, per unit surface area.

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Example Sentences

As the CAR T cells slowly expand, the surface density of PEG becomes diluted, progressively restoring their ability to interact with other cells.

From Science Daily • Sep. 18, 2023

The 1980 Voyager flyby of Titan determined that the surface density of its atmosphere is four times greater than that on Earth.

From Textbooks • Oct. 13, 2016

Or time itself might work on the unstable chemistry of a picture, fading it to ghostliness or burnishing it to the surface density of a Dutch master.

From Salon • Apr. 11, 2013

Scanning electronic microscope images were used to determine both the surface density of the cubes after deposition on the layers and the size distribution of the cubes.

From Nature • Dec. 11, 2012

It can be shown that the resultant electric force normal to the surface at a point just outside a conductor is equal to 4πσ, where σ is the surface density at that point.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various