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