Physics · Oct / Nov 2023 · Paper 12 · Question 25

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?

1. Adiffraction
2. Bdispersion
3. Creflection
4. Drefraction

As printed in the paper