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WAEC Physics 2021 Theory — Question 6

Question 6 of 35 from the West African Examinations Council (WAEC) Physics 2021 Theory paper, with the correct answer and a full explanation.

5(a). Explain wave-particle duality of light.

Model answer

Wave-particle duality means light exhibits the behaviour of a wave (e.g. interference and diffraction) as well as that of a particle — travelling as photons/discrete packets of energy (e.g. in the photoelectric effect) — though not simultaneously in the same experiment.

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