Exam-style question
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What is the relationship between the frequency of the two progressive waves that form a stationary wave?.
- A.They must have different frequencies
- B.They must have the same frequency
- C.One must be twice the frequency of the other
- D.Frequency does not affect stationary wave formation
Model answer
What a good answer should say
- They must have the same frequency
Explanation
Why this works
For stationary waves to form, the two progressive waves must have the same frequency to ensure that they can interfere constructively and destructively at the same points in space, creating the characteristic nodes and antinodes.
Common mistake
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