 What happens when light hits a surface?  it could be absorbed This would heat up the object.

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Presentation transcript:

 What happens when light hits a surface?

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

  It could be reflected

  It could be refracted

  It could be diffracted

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

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

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  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

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

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

  frac/ frac/  Teacher’s Domain   Root beer   Tractor analogy