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Cambridge IGCSE Physics practice

Paper 4 structured question: Stars

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Stars

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Paper 4Theory (Extended)1 marks

Understanding astronomical distances

Description

Light-Year Measurement

A light-year is a unit of distance used in astronomy to measure how far light travels in one year. It is equivalent to approximately 9.5 x 10^15 meters.

  1. a

    State the distance of one light-year in meters.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Stars

Paper 4Theory (Extended)2 marks

Description

Distance Measurement

Astronomers often use light-years to express distances between stars and galaxies. One light-year is the distance light travels in one year, approximately 9.5 x 10^15 meters.

  1. a

    State the significance of using light-years in astronomy.

    Aim for approximately 2 distinct marking points.

    [2]