WAEC Physics 2025 Theory — Question 21

Question 21 of 34 from the West African Examinations Council (WAEC) Physics 2025 Theory paper, with the correct answer and a full explanation.

11a(i) Give two similarities between photoelectric emission and evaporation.

Model answer

Both processes: are surface phenomena; involve the escape of particles (electrons or molecules) from a material; require energy input for the particles to escape.

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