d) Total internal reflection

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Last updated 9:37 PM on 3/5/26
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4 Terms

1
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  • define total internal reflection

  • when light hits a boundary and completely reflects within the original medium

2
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  • define critical angle

  • angle of incidence that causes the angle of refraction to be 90°

3
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  • state the two conditions required for total internal reflection to occur

  • light travels from a medium with a higher refractive index to the boundary of a medium with a lower refractive index

  • incident angle > critical angle

4
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  • state the formula for the critical angle of a material when light hits the boundary of air

  • sinC = 1/n

    • sine of the critical angle (°) = 1 / refractive index of the reflective medium