From Canada with Love
Truth versus Guns


Rage of particle size of depleted uranium (DU)
from by DU-weapons use
in comparison with the wavelengths of visible light.

Rolf A. F. Witzsche - May 20, 2006


DU particle sizes and other measurements 
(see above report - page 10 of 18)

The mean aerodynamic diameter of battlefield DU was assumed by the Royal Society to be between 1 and 5 microns. However, measurements made by the US Military in the late 1980s using sophisticated filter systems showed that the main particle diameters were much smaller than this. The table below gives the diameters of DU particles found in an analysis by the Pacific Northwest Laboratory in a study in 1984, and Glissmeyer et al in 1985. The table shows the approximate aerodynamic equivalent particle size distribution for DU particles obtained from outdoor test firings (Glissmeyer, Mishima and Bamberger, 1985) 

Particle AMAD micrometers  Mass percent in size range.

smaller than 0.18 (Ám)
180 nm (nanometers)
0.18-0.56 (Ám)
180 to 560 nm
0.56-1.8 (Ám)
  560 to 1800 nm
1.8-5.6 (Ám) 13%
5.6-18 (Ám) 11%
18-56 (Ám) 7%
greater than 56 (Ám) 9%

Please note that more than half the DU particles, by mass, are smaller in size than the wavelengths of light, and half of those are several times smaller than that.

The dispersion of the small nano-sized particles in air is because of their small size similar to the dispersion of gases. 

PS: Particles smaller that the wavelengths of light can be 'seen' and measured with a variety of electron microscopes. The most advanced of these, the High Resolution Transmission Electron Microscope (HRTEM) can resolve objects as small as a silicon atom of 78 picometers at 50-million-fold magnification. (see more)

Approximate wavelength of light 
(in vacuum) for the various colors (see above)

Color Wavelength (nm)


780 - 622


622 - 597


597 - 577


577 - 492


492 - 455


455 - 390



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