| Date | May 2014 | Marks available | 1 | Reference code | 14M.1.SL.TZ1.15 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 15 | Adapted from | N/A |
Question
Two loudspeakers, L1 and L2, emit identical sound waves.
The waves leaving L1 and L2 are in phase and are observed at points P and Q.
The wavelength of the sound is 0.60 m. The distances of points P and Q from the loudspeakers are shown in the diagram.
Which of the following is true about the intensity of the sound at P and the intensity of the sound at Q?
Markscheme
B
Examiners report
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