Exam-style question
Try this first
What conditions are necessary for sustained interference to occur?.
- A.Two coherent sources of waves with the same frequency and phase
- B.Two waves traveling in opposite directions
- C.Waves of different frequencies
- D.Waves that are not coherent
Model answer
What a good answer should say
- Two coherent sources of waves with the same frequency and phase
Explanation
Why this works
Sustained interference occurs when two coherent sources of waves, which have the same frequency and a constant phase difference, interact. This condition allows for the consistent formation of interference patterns, such as maxima and minima.
In contrast, waves that are not coherent or have different frequencies will not produce stable interference patterns. Thus, coherence is essential for sustained interference to manifest.
Common mistake
No common mistake is linked to this question yet.