What range of wavelengths does a visible spectrophotometer measure?

A visible spectrophotometer measures light in the range of wavelengths from approximately 380 to 750 nanometers (nm). This range corresponds to the visible spectrum, which is the portion of the electromagnetic spectrum that can be detected by the human eye. It begins just beyond the ultraviolet range at around 380 nm and extends to the beginning of the infrared range at about 750 nm.

This measurement is critical for various applications in bioscience, such as determining the concentration of substances in a solution based on light absorption, which hinges on the principle that different substances absorb light at different wavelengths. The other ranges listed do not encompass the full visible spectrum, thereby making them unsuitable for use in visible spectrophotometry.