Assertion : The Doppler formula for sound wav | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The Doppler effect for sound waves depends on the medium. The formula is given by $f' = f \left( \frac{v \pm v_o}{v \mp v_s} \right)$,where $v$ is

Vedclass · Accepted Answer

If both the Assertion and Reason are incorrect.

Vedclass · Answer

(D) The Doppler effect for sound waves depends on the medium. The formula is given by $f' = f \left( \frac{v \pm v_o}{v \mp v_s} \right)$,where $v$ is the speed of sound in the medium,$v_o$ is the speed of the observer,and $v_s$ is the speed of the source.Because the medium provides a preferred frame of reference,the effect is not symmetric with respect to the source and the observer. Therefore,the Assertion is incorrect.The motion of a source relative to a stationary observer is physically different from the motion of an observer relative to a stationary source because the medium is stationary in one case and moving relative to the observer in the other. Thus,the Reason is correct.

$Assertion :$ The Doppler formula for sound waves is symmetric with respect to the speed of the source and the speed of the observer.
$Reason :$ The motion of a source with respect to a stationary observer is not equivalent to the motion of an observer with respect to a stationary source.

Similar Questions

$A$ whistle of frequency $500 \, Hz$ tied to the end of a string of length $1.2 \, m$ revolves at $400 \, rev/min$. $A$ listener standing some distance away in the plane of rotation of the whistle hears frequencies in the range (speed of sound $= 340 \, m/s$):

$A$ car moving towards a wall at a velocity of $30 \, m/s$ sounds a horn of frequency $600 \, Hz$. What frequency $(Hz)$ will the driver hear? (Speed of sound in air = $330 \, m/s$)

$A$ source of frequency $150 \, Hz$ is moving in the direction of a person with a velocity of $110 \, m/s$. The frequency heard by the person will be .... $Hz$ (speed of sound in medium $= 330 \, m/s$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$Assertion :$ The Doppler formula for sound waves is symmetric with respect to the speed of the source and the speed of the observer.$Reason :$ The motion of a source with respect to a stationary observer is not equivalent to the motion of an observer with respect to a stationary source.