Home
Class 11
PHYSICS
When source and detector are stationary ...

When source and detector are stationary but the wind is blowing at speed `v_W`, the apparent wavelength `lamda'` on the wind side is related to actual wavelength `lamda` by [take speed of sound is air as v]

A

`lamda'=lamda`

B

`lamda'=(v_W)/(v)lamda`

C

`lamda'=(v_W+v)/(v)lamda`

D

`lamda'=(v)/(v-v_W)lamda`

Text Solution

Verified by Experts

The correct Answer is:
C

`lamda'=(v+v_(omega))/(f)=(v+v_(omega))/(v)lamda`
Promotional Banner

Topper's Solved these Questions

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Multiple Correct|44 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Assertion-Reasoning|24 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Subjective|56 Videos

  • RIGID BODY DYNAMICS 2

    CENGAGE PHYSICS|Exercise Interger|2 Videos

  • SUPERPOSITION AND STANDING WAVES

    CENGAGE PHYSICS|Exercise Comprehension Type|5 Videos

Similar Questions

Explore conceptually related problems

An observer is approaching with a speed v , towards a stationary source emitting sound waves of wavelength lambda_0 . The wavelength shift detected by the observer is ( Take c= speed of sound )

when a source of sound of frequency f crosses stationary observer with a speed v_(s) (lt lt speed of sound v) , the apparent change in frequency Dealtaf is given by

When a centimeter thick surface is illuminated with light of wavelength lamda , the stopping potential is V. When the same surface is illuminated by light of wavelength 2lamda , the stopping potential is (V)/(3) . Threshold wavelength for the metallic surface is

A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms^(-1) . The apparent change in the wavelength of sound heard by the observer is (speed of sound in air = 340 ms^(-1) )

When a metallic surface is illuminated with radiation of wavelength lamda , the stopping potential is V . If the same surface is illuminated with radiation of wavelength 2lamda , the stopping potential is V/4 . The threshold wavelength for the metallic surface is

The de Broglie wavelength lamda of an electron accelerated through a potential V in volts is

Speed of sound wave is v. If a reflector moves towards a stationary source emitting waves of frequency f with speed u, the wavelength of reflected waves will be

A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is 25 % more than the actual frequency. If the speed of sound is v , that of the source is

CENGAGE PHYSICS-SOUND WAVES AND DOPPLER EFFECT-Single Correct
  1. If the source is moving towards right, wavefront of sound waves get mo...

    Text Solution

    |

  2. Consider a souce of sound S, and an observer/detector D. The source em...

    Text Solution

    |

  3. When source and detector are stationary but the wind is blowing at spe...

    Text Solution

    |

  4. Figure. Represents the displacement y versus distance x along the dire...

    Text Solution

    |

  5. The driver of a car approaching a vertical wall notices that the frequ...

    Text Solution

    |

  6. The difference between the apparent frequency of a sound of soun as pe...

    Text Solution

    |

  7. The frequency of a radar is 780 MHz. After getting reflected from an a...

    Text Solution

    |

  8. A train moves towards a stationary observer with speed 34 m//s. The tr...

    Text Solution

    |

  9. A siren placed at a railway platform is emitting sound of frequency 5 ...

    Text Solution

    |

  10. A person speaking normally produces a sound intensity of 40 dB at a di...

    Text Solution

    |

  11. A police car moving at 22m//s, chases a motorcyclist, the police man s...

    Text Solution

    |

  12. In sport meet the timing of a 200 m straight dash is recorded at the f...

    Text Solution

    |

  13. When a source moves away from a stationary observer, the frequency is ...

    Text Solution

    |

  14. Length of a string of density rho and Young's modulus Y under tension ...

    Text Solution

    |

  15. Source and observer start moving simulatneously along x and y-axis res...

    Text Solution

    |

  16. A statinary observer receives a sound of frequency 2000 Hz. The variat...

    Text Solution

    |

  17. A source of sound of frequency f1 is placed on the ground. A detector ...

    Text Solution

    |

  18. A sound wave of frequency f travels horizontally to the right. It is r...

    Text Solution

    |

  19. A man is watching two trains, one leaving and the other coming in with...

    Text Solution

    |

  20. The intensity of a sound wave gets reduced by 20% on passing through a...

    Text Solution

    |