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(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation