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Question

P is the junction of two wires A and B. B is made of steel and is thicker, while A is made of aluminum and is thinner as shown in the figure(i.e.μB>μA). If a wave pulse as shown in the figure approaches P, the reflected and transmitted waves from P are respectively:


A
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B
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C
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D
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Solution

The correct option is C
At P, partial reflection along with partial transmission will take place.
Here, A is the rarer medium and B is the denser medium and wave propagates from rarer to denser medium.
So, the reflected wave undergoes phase reversal, but the transmitted wave doesn't.


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