Waves

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Across
  1. 3. distance from one crest to the next crest
  2. 7. Longest EM wave
  3. 8. Wave pattern shown by light, doesn't require matter to travel
  4. 9. Height of a wave
Down
  1. 1. Wave type that does require matter to travel
  2. 2. Symbol used to show wavelength - 11th in Greek alphabet
  3. 4. Shortest EM wave
  4. 5. Section of EMS we can observe
  5. 6. How many waves, usually in one minute