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3.2.2 Refraction of light

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Question 11

A ray of light in air is directed at the sloping face of a triangular glass prism, refracts into the glass, and then meets the horizontal base of the prism at the critical angle.

Let:

  • i i\,i be the angle of incidence at the sloping face,
  • r r\,r be the angle of refraction at the sloping face,
  • c c\,c be the critical angle at the horizontal base.

Which statement correctly describes how these three angles must be measured?

A
  • iii is the angle between the incident ray and the sloping face.
  • rrr is the angle between the refracted ray and the normal to the sloping face.
  • ccc is the angle between the ray inside the prism and the horizontal base.
B
  • iii is the angle between the incident ray and the normal to the sloping face.
  • rrr is the angle between the refracted ray and the normal to the sloping face.
  • ccc is the angle between the ray inside the prism and the vertical normal to the horizontal base.
C
  • iii is the angle between the incident ray and the normal to the sloping face.
  • rrr is the angle between the refracted ray and the sloping face.
  • ccc is the angle between the ray inside the prism and the vertical normal to the horizontal base.
D
  • iii is the angle between the incident ray and the sloping face.
  • rrr is the angle between the refracted ray and the sloping face.
  • ccc is the angle between the ray inside the prism and the horizontal base.
Markscheme

3.2.2 Refraction of light Questions

  1. IGCSE
  2. /Physics
  3. /3.2.2 Refraction of light

100 exam-style questions on CIE IGCSE Physics 3.2.2 Refraction of light. Each one has a worked solution and a mark scheme showing where the marks go.

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