- Messages
- 460
- Reaction score
- 293
- Points
- 73
I've attached the questions:
The question is c)ii, the mark scheme says that the wave is reflected off of other surfaces, which I understand, but it also says that the path difference decreases and that the amplitude decreases which I don't get. What do they mean by a decreasing path difference and amplitude and how does it relate to minima? Can it be explained by relating it to the scenario in the diagram (ie difference when the mic close to the speaker and as it moves away) and the minima-maxima graph?