Linked from
The 96 pages that link to Electromagnetic spectrum, each with the reason it gives.
MicrowaveNarrower topic: Microwaves occupy the band between infrared and radio waves.
MonochromatorNarrower topic: A monochromator selects a small region from this much broader range.
Solar radiationNarrower topic: Solar radiation occupies only part of this complete range.
LightNarrower topic: Visible light occupies only a narrow band of this broader spectrum.
SpectrometerNarrower topic: Optical spectrometers measure selected regions of this broader range.
Astronomical filterNarrower topic: Astronomical filters select limited portions of this broad range.
Yellow (color)Narrower topic: Visible yellow is a small region within this much broader spectrum.
High-energy astrophysicsNarrower topic: X-rays and gamma rays occupy its most energetic bands.
Absorption bandNarrower topic: Absorption bands occupy particular regions of this spectrum.
Infrared techniquesNarrower topic: Infrared occupies one region within this broader spectrum.