The particles of a medium vibrate about their mean positions whenever – McqOptions

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1.	The particles of a medium vibrate about their mean positions whenever a wave travels through that medium. The phase difference between the vibrations of two such particles [SCRA 1994]
A.	Varies with time
B.	Varies with distance separating them
C.	Varies with time as well as distance
D.	Is always zero
Answer» C. Varies with time as well as distance

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