Correct Answer:
B. Spectrophotometer
Understanding the function of scientific instruments is fundamental in chemistry and physics. Each instrument is designed for specific measurements.
- A spectrophotometer (B) is the correct instrument. It measures the intensity of light absorbed or transmitted by a sample at different wavelengths. This allows scientists to identify substances and determine their concentrations based on their unique absorption spectra.
- A thermometer (A) measures temperature.
- A barometer (C) measures atmospheric pressure.
- A hygrometer (D) measures humidity or the amount of water vapor in the air.