2.  What happens when light hits a surface?

3.  it could be absorbed This would heat up the object.

4.   It could be reflected

5.   It could be refracted

6.   It could be diffracted

7.   Different materials cause different amounts of refraction (higher optical density/higher index of refraction slows down the light the most) Why does light refract?

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11.   change angle of incidence  change the medium So how could we change the angle of refraction?

12.  Exactly what causes the light to bend towards or away from the normal?

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15.   Which way was the ray going?  Is it now tipping more towards the normal OR more away from the normal?  FST Freaky Science Teacher or Fast  SFA Shamrocks Fart A lot or Sofa Practice problems

16.  If something has the same index of refraction as the material it is immersed in, it will appear invisible.

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18.   Really look at the diagrams on the answer keys to be sure you understand how the illusions work Practice stations

19.   http://www.teachersdomain.org/asset/rr10_vid_re frac/ http://www.teachersdomain.org/asset/rr10_vid_re frac/  Teacher’s Domain  http://www.youtube.com/watch?v=dJD7a-WX3Gw http://www.youtube.com/watch?v=dJD7a-WX3Gw  Root beer  http://www.youtube.com/watch?v=-r6usyEQYHA http://www.youtube.com/watch?v=-r6usyEQYHA  Tractor analogy