What instrument is used to measure the amount or type of light emitted?

The fluorometer is specifically designed to measure the intensity and type of light emitted by a substance when it is excited by specific wavelengths of light. This process is essential in various applications, including biochemical assays, environmental monitoring, and fluorescent microscopy. It utilizes the principle of fluorescence, where molecules absorb light at a particular wavelength and then emit light at a longer wavelength.

In contrast, a spectrometer typically analyzes the light spectrum and can provide information on the composition and concentration of substances by measuring light intensity across a range of wavelengths, but it does not specifically target emitted light like the fluorometer. A microscope is primarily used for magnifying small objects or samples for close inspection, not for directly measuring light emissions. Similarly, a calorimeter measures heat energy released or absorbed during chemical reactions and does not focus on light measurement. Thus, the fluorometer stands out as the accurate instrument for measuring emitted light in various scientific applications.