Webb will be able to measure light wavelengths from 0.6 to 28.5 micrometers. The capabilities of the individual instruments are:

  1. Near-Infrared Camera (NIRCam): 0.6–5 micrometers
  2. Near-Infrared Spectrograph (NIRSpec): 0.7–5 micrometers
  3. Mid-Infrared Instrument (MIRI): 5–28.5 micrometers
  4. Near-Infrared Imager and Slitless Spectrograph (FGS/NIRISS): 0.6–5 micrometers