spectrophotometer
/spɛktroʊfəˈtɑmɪtər/
noun
- A scientific instrument that measures how much light of different wavelengths is absorbed or transmitted by a substance, often used to determine concentration or color.
- The spectrophotometer showed that the dye absorbed mostly blue light.
- In the water testing lab, a spectrophotometer checked the chlorine levels.
- The biologist used a spectrophotometer to measure the amount of protein in the solution.