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Search Results for: optical density

Definition noun (1) The measure of transmittance of an optical medium for a given wavelength. The higher the OD the lower... Read More

Definition noun (analytical chemistry) A logarithmic measure of the amount of light absorbed (at particular wavelength) as... Read More

Mach line The apparent line of contrasting density bordering a soft tissue shadow on a radiograph; it is an optical illusion... Read More