Question 22M.2.SL.TZ2.3b
| Date | May 2022 | Marks available | [Maximum mark: 3] | Reference code | 22M.2.SL.TZ2.3b |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | Explain, State | Question number | b | Adapted from | N/A |
A loudspeaker emits sound waves of frequency towards a metal plate that reflects the waves. A small microphone is moved along the line from the metal plate to the loudspeaker. The intensity of sound detected at the microphone as it moves varies regularly between maximum and minimum values.
The speed of sound in air is 340 m s−1.
The metal plate is replaced by a wooden plate that reflects a lower intensity sound wave than the metal plate.
State and explain the differences between the sound intensities detected by the same microphone with the metal plate and the wooden plate.
[3]
relates intensity to amplitude ✓
antinodes / maximum intensity will be decreased / quieter ✓
nodes / minimum will be increased / louder ✓
difference in intensities will be less ✓
maxima and minima are at the same positions ✓
OWTTE
