What does it mean for waves to be "in phase"?

Question

Group of answer choices

the waves are producing constructive interference

the waves are undergoing circular progression

the waves are undergoing linear progression

the waves are producing destructive interference

Answer 1

For waves to be "in phase" means that the waves are producing constructive interference.

In phase waves have the same frequency and are aligned in such a way that their crests and troughs coincide, leading to an increase in amplitude. This results in constructive interference.

So, the correct choice is:

the waves are producing constructive interference.