Abbreviations and Specific Names. Abbreviations and acronyms based on proper nouns should be written in all capital letters. In most cases, derivative words do not need to be capitalized. This applies to terms based on a professionalâs surname that are used in a general sense today.
Length times width times depth (L x W x D) measures cubic feet and must be measured in feet.
5.4 Optical depth. The product of linear extinction coefficient and distance, or, more properly, if the extinction. coefficient varies with distance, the integral of the extinction coefficient with respect to distance, â«Îº(x)dx , is the optical depth, or optical thickness, Ï. It is dimensionless.