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define / state / determine
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(a) Define the angle of reflection. (b) State the law of reflection. (c) Supplement. A laser beam reflects off a plane mirror. The incident beam and the reflected beam are 64° apart. Determine the angle between the incident beam and the surface of the mirror.
define: give the precise meaning. state: give a concise answer. determine: find the answer from the information given.
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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