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    This is quite an easy question, but I always doubt they put straightforward questions.
    The answer is B right?
    http://imgur.com/QUvGC0Z

    Thanks in advance!
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    (Original post by Daniel Atieh)
    This is quite an easy question, but I always doubt they put straightforward questions.
    The answer is B right?
    http://imgur.com/QUvGC0Z

    Thanks in advance!
    Yep
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    Think of it as two waves and when they're in phase you get a larger amplitude.
 
 
 
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Updated: July 25, 2014
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