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When source of sound moves away from sta...

When source of sound moves away from stationary listener we obtian `f _(L) lt f _(S).` Why ?

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We have the formula, `(f _(L))/(v + v _(L)) = (f _(S)/(v + v _(S)))`
`therefore (f _(L))/(v +0) = (f _(S))/(v + v _(S))`
`therefore f_(L) = ((v)/( v + v _(S))) f _(S) implies f _(L) lt f _(S) (because (v)/(v + v _(S)) lt 1)`
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