7th Science Light and Reflection refraction rainbows and colour

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Across
  1. 2. does not give out its own light
  2. 5. the colors of light that cannot be made by mixing any other colors of light: red, gree, and blue
  3. 7. pieces of glass or transparent plastic designed to refract light in certain ways.
  4. 8. when a light ray bends so its angle measured from the normal increases.
  5. 11. changed to become unclear
  6. 12. a blue-green color, made by adding blue light and green light.
  7. 13. when a light ray bends so its angle measured from the normal decreases.
  8. 16. of light, cannot pass through an object or be reflected from it
  9. 17. a change in the direction of light caused by a change in the speed of the light when passing from one medium into another.
  10. 19. of light (or waves), the substance through which the light (or waves) travel
  11. 21. separating white light into its component colors.
Down
  1. 1. transparent pieces of glass or plastic that are colored to allow only some colors of light to pass through
  2. 3. the continuous range of colors in white light: red, orange, yellow, green, blue, indigo, violet (ROY-G-BIV)
  3. 4. a pink color, made by adding red light and blue light
  4. 6. the angle made by a ray of light that has bent at a surface, measured from the normal.
  5. 9. describing a shape with three straight sides
  6. 10. in refraction, the change in direction of a light ray.
  7. 14. of a filter, to allow light to pass through
  8. 15. a three-dimensional shape with a constant cross-section
  9. 18. taking something away
  10. 20. of light (or waves), the substance through which the light (or waves) travel