DP Physics (last assessment 2024)
Question 22M.2.SL.TZ2.3a.ii
| Date | May 2022 | Marks available | [Maximum mark: 2] | Reference code | 22M.2.SL.TZ2.3a.ii |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | Calculate | Question number | a.ii | Adapted from | N/A |
a.ii.
[Maximum mark: 2]
22M.2.SL.TZ2.3a.ii
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.
(a.ii)
Adjacent minima are separated by a distance of 0.12 m. Calculate .
[2]
Markscheme
wavelength = 0.24 «m» ✓
= «=» 1.4 «kHz» OR 1400 «Hz» ✓
Allow ECF from MP1
