Two observers stand at different distances from the bed of a railroad, when a train passes them, each hears how the frequency of the train whistle change with the change occurring along curve 1 for one observer and along curve 2 for the other. Which of the two observers is standing closer to the railroad. If (1) then write (1), if (2) then write (2), if both are at same distance then write (3).
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(1)
Closer the distance, in short time large variation.
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