micrometre
Noun
Meaning
micrometre (plural micrometres)
An SI/MKS unit of measure, the length of one millionth of a metre. Symbol: µm, um, rm
Synonyms
Anagrams
Examples
Because the ratio of surface area to volume (and thus mass) increases with decreasing particle size, dusty ( micrometre -size) particles are susceptible to radiation pressure even in the outer solar system.
Computer generated light diffraction pattern from a circular aperture of diameter 0.5 micrometre at a wavelength of 0.6 micrometre (red-light) at distances of 0.1 cm – 1 cm in steps of 0.1 cm.
However, Ytterbium doped fibre lasers and amplifiers, operating near 1 micrometre wavelength, have many applications in industrial processing of materials, as these devices can be made with extremely high output power (tens of kilowatts).
In the SI, the systematic name micrometre became the official name of the unit, and μm became the official unit symbol.
Spectral and atmospheric properties of brown dwarfs The majority of flux emitted by L and T dwarfs is in the 1 to 2.5 micrometre near-infrared range.
The peak of the blackbody spectrum is in the deep infrared, at about 10 micrometre wavelength, for relatively cool objects like human beings.