Across
- 1. The range of electromagnetic waves from radio waves to x-rays
- 5. The direction energy is carried as a light wave moves forward
- 6. A beam of light of a single wavelength focused in a single direction
- 7. The type of light that helps humans see the world
- 8. A dark area where light is blocked by an object
- 9. A form of electromagnetic energy, some of which is visible
Down
- 2. A type of wave that comes from the sun
- 3. A type of wave that forms an S shape
- 4. A type of wave that is used in "night vision" equipment