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Exam-style practice

Light answer explanations

Review worked answers and explanations for Light. Aligned to Cambridge IGCSE Combined Science.

Answer explanations

Question 20 of 28

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Paper 3 structured question: Light

Paper 3Theory (Core)2 marks

Description

Light Behavior in Lenses

When parallel rays of light pass through a converging lens, they focus at a point known as the principal focus. The distance from this point to the lens is the focal length.

  1. a

    Explain the significance of the principal focus and focal length in lens design.

    [2]
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