M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

One method for measuring the concentration of an analyte is to pass light through the sample and to measure how much is lost. This is known as percent transmission. Another method is pass light through the sample and to measure light at a longer wavelength (lower energy) than the incident light (the light shone onto the sample). What property of the analyte is being measured when a longer wavelength is measured (as opposed to percent transmission)?

A

fluorescence

B

absorbance

C

color

D

density