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Asked by sarveshvibrantacademy | 21 Mar, 2019, 10:32: AM
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Observer and source are moving in opposite direction.
 
Hence the pulse arrives the observer in time  ( a / (vs - v2 ) )
Answered by Thiyagarajan K | 21 Mar, 2019, 16:19: PM

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JEE main - Physics
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