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When the source is moving towards the st...

When the source is moving towards the stationary observer, the apparent frequency is given by

A

`n_1=(v+v_0)/(v-v_s)n_0`

B

`n_1=(vn)/(v+v_s)`

C

`n_1=(vn)/(v-v_s)`

D

`n_1=[(v+v_0)n]/v`

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