SNC2P Physics Key Terms

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Across
  1. 6. ________________ light is the only type of light that we can see with our eyes.
  2. 7. Where the principal axis touches the mirror.
  3. 10. The study of how light bounces off of objects.
  4. 11. Remove some colours from white light sources.
  5. 13. When light moves from a fast medium to a slow medium, the refracted ray bends ________ the normal.
  6. 14. Translucent objects let light through but ________________ it.
  7. 15. Flat or curved reflective surface.
  8. 18. The "S" in SALT
  9. 20. Green and magenta are ______________ colours.
  10. 23. Images in diverging mirrors are always virtual and _________ in size.
  11. 25. Beyond this angle, total internal reflection will occur instead of refraction.
  12. 26. light travels in __________ lines.
  13. 29. When light hits an object an bounces off.
  14. 31. Nuclear fusion produces energy here.
  15. 32. Light is a form of _________________.
  16. 33. Absorbs all colours of light.
  17. 36. Coloured part of the eye.
  18. 37. A representation of an object, whether real or virtual.
  19. 40. Candles and bulbs with filaments create light this way.
  20. 42. The ______________ spectrum contains visible light, Ultraviolet radiation and microwaves.
  21. 44. A ________________ can be used to separate white light into all of the colours of the rainbow.
  22. 46. Common vision problem amongst the elderly.
  23. 47. The ____________ ray is the one that strikes the mirror at the normal.
  24. 48. When an object is in front of the focus in a converging mirror, the image will appear _____ in size.
Down
  1. 1. Special cells in the eye that help us see in low light.
  2. 2. This type of mirror or lens spreads light out.
  3. 3. Objects that create light are called _______________ objects.
  4. 4. A lemon reflects this colour of light and absorbs all others.
  5. 5. Mix the primary colours of pigment to produce coloured pictures.
  6. 8. ____________ of light are represented by an arrow travelling in one direction.
  7. 9. Whether an image is right-side up or upside down.
  8. 12. __________________ objects let all light pass through.
  9. 16. The type of reflection that occurs in plane mirrors and produces clear images.
  10. 17. When someone is _____-sighted, they need glasses with diverging lenses.
  11. 19. Uses chemiluminescence to produce light.
  12. 21. __________________ objects do not let any light pass through.
  13. 22. The angle of incidence is ____________ to the angle of reflection.
  14. 24. Light travels in the form of _________________.
  15. 25. Fluorescence is used in these energy-efficient bulbs.
  16. 27. Contain lenses to bend light and help people see clearly.
  17. 28. If light is ___________________ it goes straight through an object.
  18. 30. When light bends at the boundary of two transparent mediums.
  19. 33. When someone is far sighted, light focuses _______ their retina.
  20. 34. Reflects all colours of light.
  21. 35. Where light must focus in the eye for us to see clearly.
  22. 38. Special cells in the eye that detect colour.
  23. 39. Objects may heat up if light is _____________ by them.
  24. 41. The process of the lens in the eye stretching or contracting so that we can focus.
  25. 43. this type of mirror or lens focusses light at a single point.
  26. 45. Sparkles due to total internal reflection.
  27. 46. Absorb some colours and reflect others.