CAIE A-Level Physics AS 7.3.1 When a Source of Sound Waves Moves Relative to a Stationary Observer the Questions
Explain electromagnetic waves as transverse waves that can travel through a vacuum.
- Syllabus
- 2028–2030
- Course
- Physics 9702
- Level
- AS
Exam points
- Explain electromagnetic waves as transverse waves that can travel through a vacuum.
CAIE A-Level Physics AS 7.3.1 When a Source of Sound Waves Moves Relative to a Stationary Observer the Questions question 1
[Maximum number: 1]
An ambulance siren emits a sound with a single frequency f.
The ambulance travels towards, passes close to, and then travels away from a stationary observer.
Which statement describes the frequency of the sound detected by the observer as the ambulance passes the observer?
A
equal to f and decreasing
B
equal to f and increasing
C
greater than f and constant
D
less than f and constant
A
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