A bright light and a noisy sound!

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Across
  1. 6. turns white light into a rainbow
  2. 7. an invention of Bell
  3. 8. the inventor of the light bulb
  4. 10. how high or low a sound is
  5. 11. are a source of light
Down
  1. 1. the space between light waves
  2. 2. light can,t pass through
  3. 3. an instrument
  4. 4. another invention of Edison
  5. 5. energy and travels at 186,000 miles per sec
  6. 9. anything you can hear