In spectrophotometry, often a cut off optical filter is used. With reference to a long-pass filter, which rejects any wavelengths outside a predetermined interval: low transmission in short wavelengths range and high transmission in long wavelength ranges.
Some are orange, orange-yellow, dark orange, may appear similar to a novice if not labelled well.
How can a beginner see/detect if they have used a wrong filter by looking at the spectra before they continue using it? Practical troubleshooting tips and knowledge?