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InkFlaskCambridge IGCSE
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The law of reflection

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The diagram shows a ray of light reflecting at a plane mirror. Match each numbered line to what it is.

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A ray of light reflecting at a plane mirror. Four lines are numbered: line 1 is horizontal, with hatching on its lower side; line 2 is dashed and rises from line 1 at 90° where the ray hits it; line 3 comes down from the upper left with an arrow pointing towards line 1; line 4 leaves towards the upper right with an arrow pointing away. Four angles are marked: w between line 3 and line 1, x between line 3 and line 2, y between line 2 and line 4, and z between line 4 and line 1. (enlarge)
Match each item
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Scope and sources

Cambridge IGCSE Physics 0625 · 2026–2028 v2 · Original learning materials.

The normal, the angle of incidence and the angle of reflection (3.2.1.1); the image in a plane mirror: same size, as far behind the mirror as the object is in front, and virtual (3.2.1.2); the angle of incidence equals the angle of reflection (3.2.1.3); Supplement: simple constructions, measurements and calculations for reflection by plane mirrors (3.2.1.4). Reflection of water waves is in Waves in a ripple tank, refraction in Refraction and total internal reflection; curved mirrors are not in this syllabus.

Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.

Official Cambridge syllabus