O-LevelPhysicsWaves5054/12 · Oct/Nov 2023 · Q251 Mark
A bell, on a wall outside a classroom, rings. A student is standing at point X shown on the view from above. The door of the classroom is closed and the student in the room at X hears the bell ring. The door is opened, and the sound heard by the student from the bell is louder. What causes the sound reaching the student to be louder?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Adiffraction
Bdispersion
Creflection
Drefraction
✓ Correct answer
A: diffraction
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