1st statement: crest and trough are always formed, not only crest 2nd statement: the maximum amplitudes after superposition of two waves is defined as constructive interference , so the amplitude is indeed increased
I don't have the question. But " interference " is actually a general term. When two waves meet, the superposition of waves leads to wave interference . Hence, interference is a result of wave superposition.
The 2 waves are going to pass each other rather than being reflected...each other, according to the principle of superposition, the resultant amplitude of the wave is the algebraic sum of amplitude of the two waves .
Wave interference concerns with the waves themselves, not the sources... for constructive and destructive interference are that the two waves must be coherent (同步) and monochromatic (i.e. of the same single freuqency (單一頻率...