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When a wave i...

Question

When a wave is reflected from a ___________ medium, there is no change of phase.

A

rarer

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B

denser

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C

both

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D

none of the above

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Solution

The correct option is A rarer
when reflection of wave takes place from the denser medium then it undergoes a phase change of $π$ . Since, here in question the phase is not changing so the medium must be rarer.
answer is A.

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