electromagnetic spectrum test

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Across
  1. 5. the radio waves with the shortest wavelength
  2. 8. the complete range of electromagnetic waves
  3. 13. a method of transmitting signals by changing the frequency of a wave
  4. 15. a system that used reflected radio waves to detect objects and measure their distance and speed
  5. 16. if it gives off it's own light it is
  6. 17. you use this to view the different colours a light bulb gives off
  7. 18. if you see it by reflected light it is
  8. 19. electromagnetic waves with wavelengths shorter than visible light
Down
  1. 1. a bulb that contains neon or argon gas and a small amount of solid sodium or mercury
  2. 2. a bulb that contains a gas and is coated on the inside with a powder
  3. 3. electromagnetic waves you can see
  4. 4. a bulb that has tungsten filament and contains a halogen gas such as iodine or bromine
  5. 6. a method of transmitting signals by changing the amplitude of a wave
  6. 7. electromagnetic waves with the shortest wavelengths
  7. 9. a bulb that glows when a filament inside gets hot
  8. 10. an image that shows different temperature in different colours
  9. 11. electromagnetic waves with wavelengths just shorter than ultraviolet rays
  10. 12. the electromagnetic waves with the longest wavelengths and lowest frequencies
  11. 14. electromagnetic waves with wavelengths shorter than radio waves