Which is the lowest point of a transverse wave: crest, compression, rarefaction or trough?
عرضی لہر کا پست ترین حصہ قمہ، تکاثف، تخلخل یا قعر ہے؟
Solution & explanation
Trough; crest is the highest point.
Independent study answer. Original textbook ↗ · English-medium printed page 43.