CAIE A-Level Physics AS 8.3.1 The Terms Interference and Coherence Questions
Define interference and coherence, including the conditions required for coherent sources.
- Syllabus
- 2028–2030
- Course
- Physics 9702
- Level
- AS
Exam points
- Define interference and coherence, including the conditions required for coherent sources.
CAIE A-Level Physics AS 8.3.1 The Terms Interference and Coherence Questions question 1
Microwaves are emitted from two sources at points X and Y. The two waves meet at point Z. The diagram shows the paths of the two waves.
The waves emitted from points X and Y are coherent.
What is a direct consequence of the two waves being coherent?
A
There is a constant difference in the path lengths YZ and XZ .
B
There is a constant difference in phase between the two waves at Z.
C
There is a constant non-zero difference in frequency of the two waves at Z.
D
There is a constant non-zero difference in amplitude of the two waves at Z .
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