WordGarden.iospectrophotometer
C2Pronunciation
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Meanings
Noun
an instrument used to measure how much light a substance absorbs or transmits at different wavelengths
Beyond the definition
Imagine you're an artist trying to match a paint color exactly, or a chemist trying to find out how much of a chemical is in a liquid. That's where a spectrophotometer comes in. It's a special instrument that shines light at a sample and measures how much light is absorbed, transmitted, or reflected. Because different materials interact with light in different ways, it can help show what is in a sample or how much of it is there. It's a bit like giving a material a "light fingerprint." You'll find these tools in places like food production, medical labs, and research settings.
A spectrophotometer is an instrument used to measure how a substance interacts with light across different wavelengths. The name itself gives you a clue: "spectro" refers to the spectrum, or range of light, and "photometer" means a device that measures light.
Think of shining a flashlight through different colored filters: some let more light pass through than others, and some bounce more light back. A spectrophotometer does something similar, but with far greater precision. It sends light at a sample, which could be a liquid, solid, or gas, and measures how much light is absorbed, transmitted, or reflected at particular wavelengths.
The pattern of light interaction can act like a kind of "light signature." This helps scientists study what is in a sample and, very often, how much of it is there. For example, it can be used to measure the concentration of a drug in blood, analyze pigments in plants, check the quality of food coloring, or compare the color of manufactured products. Different types exist too. Some work with visible light, while others use ultraviolet (UV) or infrared (IR) light for more detailed analysis.
Spectrophotometers are important tools in chemistry, biology, physics, materials science, environmental monitoring, and many industrial labs. They are used in research, quality control, hospitals, and even art conservation to better understand the composition and properties of materials. So when someone needs to learn something from the way a sample responds to light, this instrument is often doing the work behind the scenes.
Examples
- 1
Lab measurement
The lab technician placed the sample in a spectrophotometer and waited for the reading.
- 2
Calibration
Before the experiment started, she calibrated the spectrophotometer to make sure the results were accurate.
- 3
Chemistry class
The chemistry department has several spectrophotometers, so students can work in small groups during lab class.
See also
Similar
- spectrometer
- photometer
Shades of meaning
- colorimeter
- uv-vis spectrophotometer
Contrast
- fluorometer
- spectroscope
Used with (collocations)
- spectrophotometer reading
- calibrate a spectrophotometer
- spectrophotometer cuvette
Word family
- spectrophotometry
- spectrophotometric
Explore
- absorbance
- wavelength
Forms and spellings
1 form open this card.
Main spelling
- spectrophotometernoun