Across
- 1. something that a wave can travel through
- 4. a wave that does not require a medium to travel through
- 6. a wave that moves parallel
- 7. A wave that moves perpendicularly
- 9. a wiggle in time
Down
- 1. a wave that requires a medium to travel through
- 2. the number of to-and-fro vibrations in a given time
- 3. the time it takes to complete a vibration
- 5. a wiggle in space and time
- 8. the acronym to remember the color relative to wavelength