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A-LevelPhysicsWaves9702/12 · May/June 2024 · Q221 Mark

A loudspeaker is playing music in a room. The door to the room is open and has a width of 0.80 m. Sound waves of many different frequencies pass through the doorway and diffract. The speed of sound in air is 340 m s⁻¹. Which frequency of sound wave diffracts the most as it passes through the doorway?

A2.4 × 10⁻³ Hz

B8.0 × 10⁻¹ Hz

C2.7 × 10² Hz

D4.3 × 10² Hz

✓ Correct answer

D: 4.3 × 10² Hz

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About this question

Topic: Waves, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2024 Paper 1 Variant 2, question 22.

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