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Cambridge IGCSE Physics practice

Paper 3 structured question: Refraction of light

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Refraction of light

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Paper 3Theory (Core)2 marks

Understanding total internal reflection.

Description

Total Internal Reflection

Light traveling from a denser medium to a less dense medium can be totally internally reflected if the angle of incidence exceeds the critical angle.

  1. a

    Define the term 'critical angle'.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Refraction of light

Paper 3Theory (Core)1 marks

Description

Critical Angle Scenario

When light travels from water (n=1.33) to air (n=1.00), it can undergo total internal reflection if the angle of incidence is greater than the critical angle.

  1. a

    State the critical angle for light traveling from water to air.

    Aim for approximately 1 distinct marking point.

    [1]