When both the listener and source are moving towards each other, then which of the following is true regarding frequency and wavelength of wave obserseved by the observer?

Options

A. More frequency, less wavelength
B. More frequency, more wavelength
C. Less frequency , less wavelength
D. More frequency, constant wavelength

Answer

A

Explanation

Both source and listener are approaching each other.

`:.v'gtv`
Also `lamda'ltlamda`
So, listener, listens more frequency and observes less wavelength.