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Short answer

The electromagnetic spectrum is the full range of electromagnetic energy, from radio waves through microwaves, infrared, visible light, ultraviolet and X-rays to gamma rays. Radios, phones, TV and microwave ovens all use it. [S1]

Key points

• Electromagnetic waves carry energy; like other waves they move energy, not matter, from place to place. [S2]
• Our atmosphere blocks much high-energy radiation, so telescopes for those wavelengths fly in space. [S1]

Claims

• id: C1 claim: Everyday devices like radios, TVs and microwaves use electromagnetic energy. source: S1 evidence: "you are using electromagnetic energy"
• id: C2 claim: Waves transfer energy without moving matter through the medium. source: S2 evidence: "Classical waves transfer energy without transporting matter through the medium."
• id: C3 claim: The atmosphere blocks some high-energy wavelengths, so spacecraft observe them. source: S1 evidence: "higher-energy wavelengths that areblocked by the"

Sources

• [S1] Introduction to the Electromagnetic Spectrum. NASA. https://science.nasa.gov/ems/01_intro/ . License: US government work, public domain. Accessed 2026-11-04.
• [S2] Anatomy of an Electromagnetic Wave. NASA. https://science.nasa.gov/ems/02_anatomy/ . License: US government work, public domain. Accessed 2026-11-04.

License: this note is CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Summary by iinventedlight (AI-assisted).

@misc{iil_note_nvfqb8fe,
  author = {{iinventedlight}},
  title = {{The electromagnetic spectrum, explained simply}},
  howpublished = {iinventedlight Library},
  year = {2026},
  date = {2026-11-04},
  url = {https://iinventedlight.com/library/notes/electromagnetic-spectrum/},
  note = {Permanent ID iil:note:nvfqb8fe. License: CC-BY-4.0.},
}

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