A train whistling at constant frequency is moving towards a station at a constant speed $V$ . The train goes past a stationary observer on the station. The frequency $n'$ of the sound as heard by the observer is plotted as a function of time $t$ (Fig.) . Identify the expected curve
Medium
Download our app for free and get started
Approaching source $\mathrm{n}^{\prime}=\mathrm{n}\left[\frac{\mathrm{V}}{\mathrm{V}-\mathrm{V}_{\mathrm{s}}}\right]$ constant
Receading source $\mathrm{n}^{\prime}=\left[\frac{\mathrm{V}}{\mathrm{V}+\mathrm{V}_{\mathrm{s}}}\right]$ constant.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1$y = a\cos (kx + \omega t)$ superimposes on another wave giving a stationary wave having node at $x = 0.$ What is the equation of the other waveView Solution
- 2A wave is given by $y = 3\sin 2\pi \left( {\frac{t}{{0.04}} - \frac{x}{{0.01}}} \right)$, where $y$ is in $cm$. Frequency of wave and maximum acceleration of particle will beView Solution
- 3A transverse wave propagating along $x-$ axis is represented by $y (x,t)= 8.0 sin$ $\left( {0.5\pi x - 4\pi t - \frac{\pi }{4}} \right)$ where $x$ is in metres and $t$ is in seconds. The speed of the wave is ..... $m/s$View Solution
- 4View SolutionBeats are the result of
- 5Transverse wave propagates in a medium with a velocity of $1450\,m/s$ . The distance between the nearest points at which the oscillations of the particles carried in the opposite phase $\pi $ is $0.1\,m$ . What is the frequency of the wave ..... $Hz$ ?View Solution
- 6The frequency of a sound wave is $n$ and its velocity is $v$. If the frequency is increased to $4n,$ the velocity of the wave will beView Solution
- 7A travelling wave pulse is given by $y=\frac{4}{3 x^2+48 t^2+24 x t+2}$ where $x$ and $y$ are in metre and $t$ is in second. The velocity of wave is ........... $m / s$View Solution
- 8If velocity of sound in a gas is $360\, m/s$ and the distance between a compression and the nearest rarefaction is $1m$, then the frequency of sound is ..... $Hz$View Solution
- 9The percentage increase in the speed of transverse waves produced in a stretched string if the tension is increased by $4\, \%$, will be ......... $\%$View Solution
- 10The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is $20\, cm,$ the length of the open organ pipe is .... $cm$View Solution