Consider two sound sources `S_1" and "S_2` having same frequency 100 Hz and the observer O located between them as shown in the fig. All the three are moving with same velocity in same direction. The beat frequency of the observer is

What is the apparent change in frequency when source and observer move with same velocity in the same direction?

A source of sound and an observer, both are moving with the same speed, in the same direction. Will there be any Doppler effect observed by the observer ?

Two sources S_1 and S_2 of same frequency f emits sound. The sources are moving as shown with speed u each. A stationary observer hears that sound. The beat frequency is ( v= velocity sound)

A source of sound emitting a note of frequency 200 Hz moves towards an observer with a velocity v equal to the velocity of sound. If the observer also moves away from the source with the same velocity v, the apparent frequency heard by the observer is

A source of sound emitting a note of frequency 200 Hz moves towards an observer with a velocity v equal to the velocity of sound. If the observer also moves away from the source with the same velocity v, the apparent frequency heard by the observer is

A source of sound of frequency 300 Hz and a receiver are located along the same line normal to the wall as shown in the figure. Both the source and the receiver are stationary and the wall receeds from the source with velocity 20ms^-1 .If the beat frequency registered by the receiver is 240/x Hz then x is : (Assume V_("sound")=300 m/s).

A source of sound of frequency 300 Hz and a receiver are located along the same line normal to the wall as shown in the figure. Both the source and the receiver are stationary and the wall receeds from the source with velocity 20ms^-1 .If the beat frequency registered by the receiver is 240/x Hz then x is : (Assume V_("sound")=300 m/s).

Derive an expression for the apparent frequencies when source and observer moving in the same direction.