Each receiver type is sensitive to a particular «band», or range of wavelengths of the electromagnetic spectrum, and data can only be taken in one band at a time. (eso.org)
The clarity of a telescope's images, or «resolution,» is determined by the size of the mirror versus the size of the wavelength of light. (webbtelescope.org)
I am quite surprised IR optical depth, as a function of wavelength in the thermal range is not measured by satellites. (judithcurry.com)