Some other materials are nearly black in particular wavelength bands.

Reflection in narrower wavelength bands can be as low as 0.1%.

They measure radiances in various wavelength bands, from which temperature may be inferred.

Bandpass filters only transmit a certain wavelength band, and block others.

Multiple images may be recorded sequentially at different narrow wavelength bands.

This feature leads to applications within various wavelength bands.

This survey scanned the entire sky in three near-infrared wavelength bands.

It takes a different wavelength band so there was no danger of anything detecting it.

The magnitude depends on the wavelength band (see below).

It operates using cold neutrons, with a wavelength band of 0.2-2.0 nm.