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Edexcel A-Level Physics Boundary Reflection

Practise Edexcel A-Level Physics transmission and reflection at boundaries using ultrasound, optical fibres, cracks and refracted ray paths.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • explain strong ultrasound reflection from large density changes such as air in lungs
  • draw reflected and refracted ray paths at glass boundaries using normals and refractive index
  • link fibre pulse spreading and lower intensity to different ray paths and light escaping

2.3.55 - Transmission and reflection at boundaries question 1

[Maximum number: 4]

Light is a transverse wave.

Two prisms, A and B, made from different types of glass are placed in contact as shown. An incident ray of light enters prism A.

Figure for Question 2.3.55 - Transmission and reflection at boundaries question 1 — Edexcel A-Level Physics AS

air

The refractive index of the glass in prism B is greater than the refractive index of the glass in prism A. When the ray of light reaches the boundary between the prisms, some light is reflected and some is refracted.

Complete the diagram to show the two paths taken by the reflected and refracted light until they have returned to the air.

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