The Spectroscopy Net
Gateway to Spectroscopy > Spectrometers > Design concepts > Resolving Power

Resolving Power

Resolving power, R, is a measure of the ability of a spectrometer to separate two close wavelengths and is defined by


where l is the average of the two wavelengths and Dl is the difference between the two wavelengths. The higher R the better the resolving power. The resolving power is the inverse of chromatic resolution.