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Cambridge IGCSE Physics practice

Paper 4 structured question: Refraction of light

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Refraction of light

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Paper 4Theory (Extended)1 marks

Application of the critical angle in optical fibers.

Description

Optical Fiber

An optical fiber has a core with a refractive index of 1.48. Calculate the critical angle for light entering the fiber from air.

  1. a

    State the critical angle for light entering the optical fiber.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Refraction of light

Paper 4Theory (Extended)1 marks

Description

Critical Angle and Refractive Index

A beam of light travels from air into a glass medium with a refractive index of 1.5. Determine the critical angle for this transition.

  1. a

    State the critical angle for light traveling from air into the glass.

    Aim for approximately 1 distinct marking point.

    [1]