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?
1 )
There is a constant difference in the path lengths YZ and XZ.
There is a constant difference in phase between the two waves at Z.
3 )
There is a constant non-zero difference in frequency of the two waves at Z.
4 )
There is a constant non-zero difference in amplitude of the two waves at Z.
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