Physics 0625 · IGCSE · Light

Light — practice question

A light ray falls on the interface between air and water. Under what conditions will the ray of light undergo total internal reflection?

  • AThe ray, initially in the air, is incident on the air-water boundary at any angle of incidence.
  • BThe ray, initially in the air, is incident on the air-water boundary at an angle of incidence greater than the critical angle.
  • CThe ray, initially in the water, is incident on the water-air boundary at any angle of incidence.
  • DThe ray, initially in the water, is incident on the water-air boundary at an angle of incidence greater than the critical angle.

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