Consider: Case-1: A moving source moving with velocity vs and a stationary receiver. Case-2: A moving receiver moving with velocity vR and a stationary source. In either case fR represents frequency heard by receiver and fS represents frequency emitted by source. Figure shows graph of R S f f on y axis and vs or vR on x axis. Mark the CORRECT option(s)

Select all that apply

• Option A

  Graph-1 corresponds to moving receiver and Graph-2 corresponds to moving source.

• Option B

  Graph-2 corresponds to moving receiver and Graph-1 corresponds to moving source.

• Option C

  Graphs to left of origin represents approaching listener and to right represents receding listener.

• Option D

  Graphs to right of origin represents approaching source and to left represent receding source.