EM Spectrum

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Across
  1. 3. EM radiation with the highest energy
  2. 4. EM radiation with wavelengths between about 400 and 700 nanometers
  3. 5. Used in cellular communication and WiFi
  4. 7. EM radiation used to determine the structure of molecules
Down
  1. 1. High-energy rays blocked by atmospheric ozone
  2. 2. Longest wavelength EM radiation
  3. 6. Emitted by warm objects