Light and Optics

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Across
  1. 3. The incoming light ray
  2. 4. The point where reflected rays meet
  3. 5. The straight line through the centre of a mirror
  4. 9. Radiation that can cause sunburns
  5. 12. A mirror that curves outward
  6. 13. A line perpendicular to a mirror
  7. 17. Type of spectrum that includes visible light
  8. 20. A type of electromagnetic radiation related to heat
  9. 22. The part of the electromagnetic spectrum humans can see
  10. 24. The bouncing of light off a surface
  11. 25. A form of energy that travels in waves
  12. 26. Electromagnetic waves used to see bones
  13. 27. Number of waves passing a point each second
  14. 28. A model showing light travelling in straight lines
  15. 30. Distance between two wave crests
Down
  1. 1. A mirror that curves inward
  2. 2. Electromagnetic waves used to heat food
  3. 6. The bending of light between materials
  4. 7. Describes how much larger or smaller an image is
  5. 8. A flat reflective surface
  6. 10. Formed when light rays meet or appear to meet
  7. 11. A type of image that cannot be projected on a screen
  8. 14. Formed when white light separates into colours
  9. 15. Electromagnetic waves used for communication
  10. 16. An object that produces its own light
  11. 18. The range of colours in visible light
  12. 19. A type of image that can be projected on a screen
  13. 21. The outgoing light ray
  14. 23. Digits that show precision in measurements
  15. 29. An object that reflects light