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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Light

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3

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2

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Light

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Paper 3Theory (Core)2 marks

Understanding the behavior of light in lenses is crucial for image formation.

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.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Light

Paper 3Theory (Core)3 marks

Description

Optical Terms

In optics, the principal axis, principal focus, and focal length are key concepts that describe how lenses and mirrors function.

  1. a

    Define the terms principal axis, principal focus, and focal length.

    Aim for approximately 3 distinct marking points.

    [3]