Question
Observe the graph/ diagram and discuss your observation.
✓
Answer
- Fig. A shows changes in density. The region where particles are crowded is called compression and where they are far apart are rarefaction.
- Fig. B show change in pressure. The lines represent layers of air. The regions when lines are crowded are high pressure regions while when they are far apart are of low pressure.
- Fig. C shows changes in density or pressure. The crest represents high pressure region while trough represents low pressure region.
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