Home
Class 12
PHYSICS
A laser is a coherent source because it ...

A laser is a coherent source because it contains

A

Many wavelenght

B

Uncoordinated wave of a particular wavelength

C

Coordinated wave of many wavelengths

D

Coordinated waves of a particular wavelength

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • HEATING AND CHEMICAL EFFECT OF CURRENT

    ERRORLESS |Exercise Self Evaluation Test|14 Videos

  • MAGNETIC EFFECT OF CURRENT

    ERRORLESS |Exercise Exercise|394 Videos

Similar Questions

Explore conceptually related problems

Coherent Sources

Laser is/ are

Laser light is considered to be coherent because it consists of

What are coherent sources of light ? Why are coherent sources required to obtain sustained interference pattern ?

In Fresnel’s biprism, coherent sources are obtained by :

Two coherent source of light can be obtained by

Two coherent sources must have the same

ERRORLESS -KINETIC THEORY OF GASES-QUESTIONS
  1. Maximum usable frequency (MUF) in F-region layer is x, when the critic...

    Text Solution

    |

  2. The electromagnetic wave of frequency 2 MHz to 30 MHz are

    Text Solution

    |

  3. A laser is a coherent source because it contains

    Text Solution

    |

  4. the attenution in optical fibre is mainly due to

    Text Solution

    |

  5. The maximum distance upto which TV transmission from a TV tower of hei...

    Text Solution

    |

  6. A laser beam is used for carrying our surgery because it

    Text Solution

    |

  7. Laser beams are used to measure long distances because

    Text Solution

    |

  8. An oscillator is producing FM waves of requency 2kHz with a variation ...

    Text Solution

    |

  9. The maximum peak to peak voltage of an AM wire is 24 mV and the minimu...

    Text Solution

    |

  10. Sinusoidal carrier voltage of frequency 1.5 MHz and amplitude 50 V ...

    Text Solution

    |

  11. What is the modulation index of an over modulated wave

    Text Solution

    |

  12. Basically, the product modulator is

    Text Solution

    |

  13. If f(0) and f(f) represent the carrier wave frequencies for amplitude ...

    Text Solution

    |

  14. Which of the following is the disadvantage of FM over AM

    Text Solution

    |

  15. If a number of sine waves with modulation indices n,n,n ........ mod...

    Text Solution

    |

  16. An AM wave has 1800 watt of total power content, For 100% modulation...

    Text Solution

    |

  17. The frequency of a FM transmitter without signal input is called

    Text Solution

    |

  18. What type of modulation is employed in india for radio transmission

    Text Solution

    |

  19. When the modulating frequency is doubled, the modulation index is halv...

    Text Solution

    |

  20. An antenna is a device

    Text Solution

    |