Across
- 2. light combination of all colors
- 4. to send something across places; to pass along
- 5. year light distance travels in years (5.88 trillion)
- 8. to take in
- 9. Allowing light to pass through
- 10. (UV) light light with wavelengths shorter than those of visible
- 12. A space where no particles of matter exist
Down
- 1. tiny pieces of light
- 3. Permitting light to pass through, but not transparent
- 6. Light light that gives off heat
- 7. A piece of glass that separates white light into colors of the spectrum.
- 11. not letting light through