Question

A train is approaching the station. Explain what happens to the frequency of the sound as the train draws closer. What do you hear?

Answer 1

The frequency of sound waves goes up, so the pitch goes up as well. More frequent=higher pitched

Answer 2

Frequency is more

Step-by-step explanation:

If there is a apparent change in the frequency of sound due to the relative motion between the observer and the source, it is called doppler effect.

The formula for the doppler effect is

`f' = (v-v_(o))/(v-v_(s))f`

Where, f be the original frequency, f' be the apparent frequency, v be te speed of sound, v0 be the speed of observer and vs be the speed of source.

So, as observer at rest, vo = 0

`f' = (v)/(v-v_(s))f`

Here, f' > f

So, the frequency of sound heared y the observer is more.