<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en-EN">law of Bouguer-Lambert and Beer (A = lg(1/τ) = εbc)           #01848</dc:title><dc:identifier>https://digilab.ptb.de/oiml-g-18/vocab/skos/967</dc:identifier><dc:language>en-EN</dc:language><dc:publisher xml:lang="en-EN">Julia Neumann</dc:publisher><dcterms:created>2022-12-19 09:13:33</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">https://digilab.ptb.de/oiml-g-18/vocab/</dcterms:isPartOf><dcterms:isPartOf xml:lang="en-EN">OIML G18 Controlled Vocabulary</dcterms:isPartOf><dc:format>text/html</dc:format> <dc:description xml:lang="en-EN"><![CDATA[ 1. Conditions for validity: A beam of parallel monochromatic radiation traverses, at normal incidence, an absorbing medium with planeparallel surfaces and which is homogeneous, isotropic, non-luminescent and non-scattering. 2. Adapted from ISO 6286, clause 3.3. ]]> </dc:description></metadata>