![]() Since absorption, \(\epsilon\), and path length are known, we can calculate the concentration \(c\) of the sample. Because a standard spectrometer uses a cuvette that is 1 cm in width, \(l\) is always assumed to equal 1 cm. Pogue said the vessel was the only five-person sub that could reach Titanic. The path length is measured in centimeters. In a tweet of the report, Pogue linked to video of himself describing the submarine as having as much room as a minivan. As a result, \(\epsilon\) has the units: L Since absorbance does not carry any units, the units for \(\epsilon\) must cancel out the units of length and concentration. ![]() The molar extinction coefficient is given as a constant and varies for each molecule.
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