B.I. 19-20 Light and Colors

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Across
  1. 3. A crisp, defined shadow that is formed when an opaque object is very close to a surface and fully blocks the light source.
  2. 4. Along with green, it is the color that humans have evolved to see the best.
  3. 6. The speed of light is very fast, but it's not ________.
  4. 7. Mixing cyan and yellow paint together leaves you green paint because all the other colors are ___________.
  5. 13. The spectrum of radiation in which visible light is a part.
  6. 15. Mixing colors of paint is called color by ____________.
  7. 16. An opaque object ________ the color that it appears unless it's like 11 Down.
  8. 17. The type of radiation that is "below" the frequency we can see.
  9. 18. Blue light mixed with red light will look ________.
  10. 19. It's the only thing we see.
Down
  1. 1. When light reflects off a surface it becomes ___________ parallel to that surface.
  2. 2. Cyan light minus blue light equals ________ light.
  3. 5. Magenta plus green light = __________ light.
  4. 7. Mixing colors of light is called color by ___________.
  5. 8. The number of waves per second.
  6. 9. The sky appears blue because the atmosphere __________ off the higher frequencies of light.
  7. 10. The material in a substance that selectively absorbs certain colors is called ________.
  8. 11. An object that can absorb all colors would appear _________.
  9. 12. Sunsets are a mix of colors because the sunlight has more __________ to interact with the atmosphere.
  10. 14. You would need to wear sunblock on a cloudy day because clouds are ___________ to ultra violet light.