In which specific spectrum must JWST excel to observe objects that Hubble struggled to analyze due to extreme redshift?

The mid-infrared spectrum

Hubble's observational power, while groundbreaking, has limitations when observing the earliest structures because the expansion of the universe stretches light significantly. For the very first galaxies, the light originally emitted in shorter wavelengths (like ultraviolet) is stretched so far that it shifts entirely into the infrared range—specifically, the longer, mid-infrared wavelengths. The James Webb Space Telescope (JWST) was specifically engineered with larger mirrors and more sensitive detectors optimized for this mid-infrared region precisely to capture the light from these highly redshifted objects that Hubble's primary detectors could not efficiently reach or analyze.