Which type of filter allows only a small range of wavelengths to pass through?

The narrow band filter is designed to transmit a very specific and limited range of wavelengths while blocking others. This capability is crucial in various applications, such as spectroscopy and optical sensing, where precise wavelength selection is necessary for accurate measurements and observations. By allowing a select band of wavelengths to pass, it enhances the ability to analyze light from various sources or materials without interference from extraneous wavelengths that could distort measurements or images. This ability to isolate a narrow range of wavelengths is what defines the function of a narrow band filter and makes it effective for applications requiring enhanced spectral resolution.