Narrowing Spectral Range: Choosing the Right English Term

'Narrow' and 'reduce' are both suitable English terms for describing a decrease in spectral range, but the best choice depends on the specific context.

'Narrow' implies a decrease in the width of the spectral range, while 'reduce' simply suggests a decrease in the overall range. For example:

• 'The filter narrowed the spectral range of the light.'
• 'The instrument reduced the spectral range by filtering out certain wavelengths.'