5 Questions
What is the main difference between a photometer and a spectrophotometer?
Photometers use a light filter for the wavelength at which the photometric measurements are made, while spectrophotometers use a diffraction grating or a prism along with a slit to get monochromatic light.
What type of light do light filters transmit in photometers?
A narrow range of spectral region (8-30nm)
What are the advantages of spectrometers over photometers?
Greater flexibility, increased sensitivity, spectral range, and narrowness
What type of procedures are limited to the visible portion of the spectrum?
Colorimetric procedures
What is the analytical instrument based on the direct measurement of color intensity in terms of light absorbed at specific wavelengths called?
Photometer
Study Notes
Photometer vs Spectrophotometer
- A photometer measures the total intensity of light, whereas a spectrophotometer measures the intensity of light at specific wavelengths.
Light Filters in Photometers
- Light filters in photometers transmit monochromatic light (light of a single color or wavelength).
Advantages of Spectrometers
- Spectrometers offer more detailed information about the properties of a sample compared to photometers.
- Spectrometers can measure the absorbance of light at multiple wavelengths, providing more comprehensive data.
Limitations of Procedures
- Colorimetric procedures are limited to the visible portion of the spectrum.
Spectrophotometry
- Spectrophotometry is an analytical instrument based on the direct measurement of color intensity in terms of light absorbed at specific wavelengths.
Test your knowledge of spectrometry and photometry with this quiz! Learn about measuring light transmission, determining light-absorbing material concentration, and the limitations of colorimetric procedures.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
