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Refraction of light
Explain and apply the concepts of normal line, angle of incidence, and angle of refraction.
9
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90
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90 min
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CambridgeIGCSEPhysicsSubject content
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Refraction of light outcomes9 objectives
- Explain and apply the concepts of normal line, angle of incidence, and angle of refraction.
- Outline a procedure for an experiment demonstrating the refraction of light using transparent blocks of various shapes.
- Explain how light travels through a transparent medium, focusing on the interfaces between two different materials.
- Explain what is meant by the critical angle in the context of light refraction.
- Explain the concepts of internal reflection and total internal reflection, providing both experimental and real-life examples.
- Define the refractive index (n) as the ratio of wave speeds in two different media.
- Recall and apply the formula sin i / n = sin r, relating angles of incidence and refraction to the refractive index.
- Recall and apply the formula 1/n = sin c, which relates the critical angle to the refractive index.
- Describe how optical fibres are utilized, especially in the field of telecommunications.
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