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so in today's lesson we're going to do
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uh physical answers question paper for
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grade 10 and then in this question we're
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going to look at firstly the multiple
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whereby we supposed to find
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um the following they're saying that
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pulse A is moving to the right with
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amplitude Y m overlaps with pulse B
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moving to the left with amplitude 1 / Y
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m so remember pulse A is moving to the
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right and P B is moving to the left and
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then the amplitude is given by Y m and
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then also the amplitude of B is given by
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now we have to find um at the point
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where which of the following combination
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will be correct when the PS meet at the
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medium so now the upper direction is
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positive and then the down direction is
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negative so it's going to be y 1 yus 1
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y and then we can see that
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um it's constructive because the
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positive direction the upper direction
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is the constructive is the the positive
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one is the constructive
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interference and the negative part is
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the destructive interference and then
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whenever we look at our final answer our
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final answer is positive so means that
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it's a constructive interference of 0
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y and option C is the other tool
