Home
Class 12
PHYSICS
A rocket is going towards moon with a sp...

A rocket is going towards moon with a speed v . The astronaut in the rocket sends signals of frequency v towards the moon and receives them back on reflection from the moon. What will be the frequency of the signal received by the astronaut (Take `v lt lt c` )

A

`(c )/(c-v) v`

B

`(c ) /(c-2v)v`

C

`(2v)/(c )v`

D

`(2c)/(v)v`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    ERRORLESS |Exercise wave Nature and Interference of Light|1 Videos

  • WAVE OPTICS

    ERRORLESS |Exercise Doppler s Effect of Light|1 Videos

  • RAY OPTICS

    ERRORLESS |Exercise SET|25 Videos

Similar Questions

Explore conceptually related problems

A stationary motion detector sends sound waves of frequency 3.00 MHz toward a truck approaching at a speed of 61.0 m/s. What is the frequency of the waves reflected back to the detector?

A rocket is moving at a speed of 200ms^(-1) towards a stationary target. While moving, it emits a wave of frequency 1000hz. Some of the sound reaching the target gets reflected back to the racket as an echo. Calculate the frequency of sound as detected by the person at the position of tartget and frequecny of echo as detected by the rocket . Given velocity of soun =330ms^(-1) .

Two submarines are approaching each other in a calm sea. The first submarine travels at a speed of 36 km h^-1 and the other at 54 km h^-1 relative to the water. The first submarine sends a sound signal (sound waves in water are also called sonar) at a frequency of 2000 Hz. (a) At what frequency is this signal received by the second submarine ? (b) The signal is reflected from the second submarine. At what frequency is this signal received by the first submarine. Take the speed of the sound wave in water to be 1500 m s^-1 .

A bat flies perpendicularly towards a wall with a speed of 6 m/s, emitting sound of frequency 450 kHz. What is the frequency of the wave reflected from the wall that it will hear? Given c=340(m)/(s) ?

An astronaut approaching the moon sends a ratio signal of frequency 5 xx 10^(3) MHz towards moon to find the speed of his rocket. The frequency of waves reflected back from the moon is 86 kHz more than the original frequency. Calculate the velocity of the rocket relative to the moon.

A laser signal sent towards the moon returns after t seconds. If c is the speed of light then the distance of the moon from the observer is

A rocket is going away from the earth at a speed 0.2 c , where c = speed of light. It emits a signal of frequency 4 xx 10^(7)Hz . What will be the frequency observed by an observer on the earth

A person standing on a road sends a sound signal to the driver of a car going away from him at a speed of 72 km h^-1. The signal travelling at 330 m s^-1 in air and having a frequency of 1600 Hz gets reflected from the body of the car and returns. Find the frequency of the reflected signal as heard by the person.

ERRORLESS -WAVE OPTICS-SET
  1. A rocket is going towards moon with a speed v . The astronaut in the r...

    Text Solution

    |

  2. Following figures shows sources S1 and S2 that emits light of waveleng...

    Text Solution

    |

  3. In a Young's double slit experimental arrangement shown here, if a mic...

    Text Solution

    |

  4. In the set up shown in figure, the two slits S1 and S2 are not equidis...

    Text Solution

    |

  5. The intensity ratio of two coherent sources of light is p. They are i...

    Text Solution

    |

  6. Three waves of equal frequency having amplitudes 10mum, 4mum, 7mum arr...

    Text Solution

    |

  7. Four different independent waves are represented by (i) y(1) = a(1) ...

    Text Solution

    |

  8. A beam of light consisting of two wavelength 650nm and 520nm is used t...

    Text Solution

    |

  9. Two identical radiators have a separation of d=lambda//4 where lambda ...

    Text Solution

    |

  10. In Young’s double slit experiment, the 8 th maximum with wavelength la...

    Text Solution

    |

  11. Light of wavelength 500nm is used to form interference pattern in Youn...

    Text Solution

    |

  12. Two coherent sources of equal intensity produce maximum intensity of 1...

    Text Solution

    |

  13. The path difference between two interfering waves of equal intensities...

    Text Solution

    |

  14. In a Young's double slit experiment, I0 is the intensity at the centra...

    Text Solution

    |

  15. In a Fresnel’s diffraction arrangement, the screen is at a distance of...

    Text Solution

    |

  16. If n represents the order of a half period zone, the area of this zone...

    Text Solution

    |

  17. A screen is placed 50 cm from a single slit, which is illuminated with...

    Text Solution

    |

  18. In Young's double slit experiment, the fringes are displaced index 1.5...

    Text Solution

    |

  19. Two waves of equal amplitude and frequency interfere each other. The r...

    Text Solution

    |

  20. In Young's double-slit experiment , we get 60 fringes in the field of ...

    Text Solution

    |

  21. A parallel- plate capacitor with plate area A and separation between t...

    Text Solution

    |