Densities

Asked by  | 11th Jul, 2008, 06:48: PM

Expert Answer:

In optics,optical  density is a unitless measure of the transmittance of an optical element for a given length at a given wavelength

phyical density is the ration of mass to volume D= m / v

Answered by  | 13th Jul, 2008, 06:38: PM

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