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CAIE A-Level Physics AS 8.1.2 Experiments That Demonstrate Stationary Waves Using Microwaves Stretched Questions

Explain stationary waves as the result of superposition of two waves travelling in opposite directions.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Explain stationary waves as the result of superposition of two waves travelling in opposite directions.

CAIE A-Level Physics AS 8.1.2 Experiments That Demonstrate Stationary Waves Using Microwaves Stretched Questions question 1

[Maximum number: 1]

A stationary sound wave is set up between a loudspeaker and a wall.
A microphone is connected to a cathode-ray oscilloscope (CRO) and is moved along a line directly between the loudspeaker and the wall. The amplitude of the trace on the CRO rises to a maximum at a position X , falls to a minimum and then rises once again to a maximum at a position Y.

The distance between X and Y is 33 cm . The speed of sound in air is 330 m s−1330 \mathrm{~m} \mathrm{~s}^{-1}.
Which diagram could represent the CRO trace of the sound received at X?

A
Figure for Question CAIE A-Level Physics AS 8.1.2 Experiments That Demonstrate Stationary Waves Using Microwaves Stretched Questions question 1 — CAIE A-Level Physics AS — Option A
B
Figure for Question CAIE A-Level Physics AS 8.1.2 Experiments That Demonstrate Stationary Waves Using Microwaves Stretched Questions question 1 — CAIE A-Level Physics AS — Option B
C
Figure for Question CAIE A-Level Physics AS 8.1.2 Experiments That Demonstrate Stationary Waves Using Microwaves Stretched Questions question 1 — CAIE A-Level Physics AS — Option C
D
Figure for Question CAIE A-Level Physics AS 8.1.2 Experiments That Demonstrate Stationary Waves Using Microwaves Stretched Questions question 1 — CAIE A-Level Physics AS — Option D
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