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Lesson: Total Internal Reflection

Question Video: Total Internal Reflection

02:43

Worksheet: Total Internal Reflection • 5 Questions

Q1:

Which of the following definitions best describes the critical angle for total internal reflection?

  • AThe critical angle is the angle at which the refracted ray travels along the boundary from which the incident ray is reflected.
  • BThe critical angle is the angle of refraction minus the angle of incidence.
  • CThe critical angle is the angle of incidence minus the angle of refraction.
  • DThe critical angle is the angle of incidence plus the angle of refraction.
  • EThe critical angle is the angle at which all incident light at a boundary is reflected.

Q2:

The rays 𝐴 , 𝐵 , and 𝐶 are shown incident on a boundary between water and air, traveling in water. Which incident ray produces total internal reflection?

  • A ray 𝐶
  • B ray 𝐴
  • CNone of the rays produce total internal reflection.
  • D ray 𝐵

Q3:

Which of the following sets of conditions best describes total internal reflection?

  • ATotal internal reflection occurs when a light ray is completely reflected at the boundary between two media of different densities and the light ray is traveling in the higher-density medium.
  • BTotal internal reflection occurs when the angle of reflection of the reflected light ray is equal to the angle of refraction of the refracted ray.
  • CTotal internal reflection occurs when a light ray is completely reflected at the boundary between two media of different densities and the light ray is traveling in the lower density medium.
  • DTotal internal reflection occurs when a light ray is completely absorbed in an object.
  • ETotal internal reflection occurs when the reflected light ray moves along the same path as the incident light ray but in the opposite direction.
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