The is a multiple choice question.
1st statement : At a point of constructive interference of two waves, a crest is always formed.
2nd statement : At a point of constructive interference of two waves, the amplitude of vibration increases.
The answer is D ( 1st statement is false, 2nd statement is true )
Can anyone explain these to me immediately ( detail) ? Thx
Waves ( interference), 20 marks
2007-02-25 9:11 am
回答 (3)
2007-02-25 9:30 am
✔ 最佳答案
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
2007-02-26 9:31 am
at a point of constructive interference, it may be from each wave a crest or from each wave a trough ((crest + crest) or (trough + trough)). so 1st statement is false.
becase of superposition, the resultant amplitude is the sum of the 2 waves, so the amplitude is increased.
becase of superposition, the resultant amplitude is the sum of the 2 waves, so the amplitude is increased.
2007-02-25 1:37 pm
At a point of constructive interference of two waves, a crest must be formed.
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