Question

guys help your friend please

Answer 1

it's option A 0

hope it help
PLZ MARK AS brainliest

Answer 2

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CORRECT ANSWER IS OPTION ( A) ☑️

❇️REASON:

⏩When a sound wave gets reflected from a rigid boundary the particles at the boundary are unable to vibrate.

⏩Thus a reflected wave is generated which interface with the oncoming wave to produce zero displacement at the rigid boundary .

⏩At this point (zero displacement )the pressure variation is maximum first a reflected pressure wave have the same face as the invident wave

➡️hence option (a) is the correct answer

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