Home
Class 11
PHYSICS
A sound wave of frequency f travels hori...

A sound wave of frequency `f` travels horizontally to the right. It is reflected from a large vertical plane surface moving to left with a speed `v`. The speed of sound in medium is `C`

A

The number of wave striking the surface per second is `f (c+v)/(c)`

B

The wavelength of reflected wave is `(c(c-v))/(f(c+v))`

C

The frequency of the reflected wave is `"f"((c+v))/((c-v))`

D

The number of beats heard by a stationary listener to the left of the reflecting surface is `(vf)/(c-v)`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
No of wave striking the surface `f = f((c+v)/(c))`
`f=f ((c)/(c-v)) = f((c+v)/(c-v))`
`lamda = (c)/(f') = (c)/(f) ((c-v)/(c+v))`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • WAVES AND OSCILLATIONS

    ALLEN|Exercise Part-1(Exercise-03)|31 Videos

  • WAVES AND OSCILLATIONS

    ALLEN|Exercise Part-1(Exercise-04)[A]|29 Videos

  • WAVES AND OSCILLATIONS

    ALLEN|Exercise Part-1(Exercise-01)|53 Videos

  • SEMICONDUCTORS

    ALLEN|Exercise Part-3(Exercise-4)|51 Videos

Similar Questions

Explore conceptually related problems

A sound wave of frequency f travels horizontally to the right . It is teflected from a larger vertical plane surface moving to left with a speed v . the speed of sound in medium is c (a) The number of waves striking the surface per second is f(c + upsilon)/(c) (b) The wavelength of reflected wave is (c(c-upsilon))/(f(c+upsilon)) (c) The frequency of the reflected wave is f((c+upsilon))/((c+upsilon)) (d) The number of beats heard by a stationary listener to the left of the reflecting surface is (upsilon f)/(c - upsilon)

The frequency of a source of sound is f. A sound wave from this source is moving horizontally twoards right. The wave is reflected from a large vertical plane moving towards left with a speed v. The speed of sound in medium is C. Find the (a) number of waves striking the surface per second. (b) Wavelength and frequency of reflected wave. (c) beat frequency.

Knowledge Check

  • A sound wave of frequency f travels horizontally to the right. It is reflected from a large vertical plane surface moving to left with a speed v . The speed of sound in mwdium is C

    A
    (a) The number of wave strinking the surface per second is `f((c + v)/(c ))`
    B
    (b) The wavelength of reflected wave is `(c(c-v))/(f(c+v))`
    C
    ( c ) The frequency of the reflected wave is `f(((c+v))/((c-v)))`
    D
    (d) The number of beats heard by a stationary listener to the left if the reflecting surface is `(vf)/(c-v)`

  • A sound wave of frequency v travels horizontally to right. It is reflected from a large vvertical plane surface moving to the left with a speed v. The speed of sound in the medium is c, then

    A
    the frequency of the reflected wave is `(v(c+v))/(c-v)`
    B
    the wavelength of the reflected wave is `(c(c-v))/(v(c-v))`
    C
    the number of waves striking the surface per second is `(v(c-v))/( c )`
    D
    the number of beats heard by a stationary listener to the left of the reflecting surface, is `(vv)/(c-v)`

  • A sound wave of frequency n travels horizontally to the right with speed with speed c. It is reflected from a broad wall moving to the left with speed v. The number of beats heard by a stationary observer to the left of the wall is

    A
    zero
    B
    `(n(c+v))/(c-v)`
    C
    `(nv)/(c-v)`
    D
    `(2nv)/(c-v)`

    • Similar Questions

    Explore conceptually related problems

    A sound wave of frequency f propagasing through air with a velocity C , is reflected from a surface which is moving away from the source with a constant speed V . Find the frequency of the reflected wave, measured by the observer at the position of the source.

    A source of sound of frequency 1000 Hz moves to the right with a speed of 32 m/s relative to the ground. To its right is a reflecting surface moving to the left with a speed of 64 m/s relative to the ground. Take speed of sound in air to be 332 m/s.

    The speed of sound wave in a given medium is

    A sound wave of wavelength lambda travels towards the right horizontally with a velocity V . It strikes and reflects from a vertical plane surface , travelling at a speed v towards the left . The number of positive crests striking in a time interval of 3 s on the wall is

    A sound wave of frequency f propagating through the air with a velocity c, is reflected from a wall which is moving away from the stationary source with a constant speed v. The frequency of the reflected wave, measured by the observer at the position of the source is

    Home
    Profile