What essential quality did the DU spectrophotometer measure?
Gravity
Electrical resistance
Temperature
Absorbance of light
Answer
The DU spectrophotometer is a device that measures the amount of light absorbed by a sample. This measurement is called absorbance. The spectrophotometer uses a light source, such as a tungsten lamp, to emit light of a specific wavelength. The light passes through the sample, and some of the light is absorbed by the sample.
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