Home
Class 12
PHYSICS
Why the amount of light emitted by the f...

Why the amount of light emitted by the fluorescent tubes is much larger as compared to the filament lamps ?

A

Tube contains gas at low temperature

B

Light is diffused through the walls of the tube

C

ultraviolet light is converted into visible light by fluorescence

D

It consumes more power than bulb

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • MODEL TEST PAPER 3

    KCET PREVIOUS YEAR PAPERS|Exercise (PHYSICS)|60 Videos

  • MODEL TEST PAPER 5

    KCET PREVIOUS YEAR PAPERS|Exercise Physics|60 Videos

Similar Questions

Explore conceptually related problems

During electrolysis of water the amount of gas collected in one of the test tubes is double the amount collected in the other why ?

A telescope of aperture 0.02 m is used to focus the two head lamps 1.2m apart. If the wavelength of light emitted by the automobile is 589.6 nm then calculate the resolving power of the telescope. If the R.P of the eye is 3.436xx10^3 "rad"^(-1) , then calculate the magnifying power of the telescope.

Why is the amount of gas collected in one of the test tubes in activity 1.7 see tesxtbook double of the amount collected in the other ? Name this gas

Why is choke coil needed in the use of fluorescent tubes with ac mains? Why can we not use an ordinary resistor instead of the choke coil?

KCET PREVIOUS YEAR PAPERS-MODEL TEST PAPER 4-PHYSICS
  1. Why the amount of light emitted by the fluorescent tubes is much large...

    Text Solution

    |

  2. A proton is accelerated through a potential difference of 1 V. Its ene...

    Text Solution

    |

  3. The ratio of the inertial mass to gravitational mass is equal to

    Text Solution

    |

  4. The ratio of maximum height reached by a particle projected under grav...

    Text Solution

    |

  5. A pressure of 10^(6)" dyne"//cm^(2) is equivalent to :

    Text Solution

    |

  6. A hydrogen atom is in p state. For this, values of j are

    Text Solution

    |

  7. Post office box is a device for measuring resistances based on the pri...

    Text Solution

    |

  8. The refractive index of glass is 1.50 and the speed of light in air is...

    Text Solution

    |

  9. If the distance between nuclei is 2xx10^(-10) cm. The density of nucle...

    Text Solution

    |

  10. The mass number of a nucleus is

    Text Solution

    |

  11. In the reaction represented by, ""(Z)""^(A)Xto.""(Z-2)""^(A-4)Yto.""...

    Text Solution

    |

  12. The relation between half-life T of a radioactive sample and its mean ...

    Text Solution

    |

  13. if the electron in hydrogen orbit jumps form third orbit to second or...

    Text Solution

    |

  14. The radius of the first orbit of electron in hydrogen atom (e=1.6xx10^...

    Text Solution

    |

  15. The frequency range of ultraviolet radiation is

    Text Solution

    |

  16. Light of wavelength 4700Å is incident on a metal plate whose work func...

    Text Solution

    |

  17. Threshold wavelength for photoelectric emission from a metal surface i...

    Text Solution

    |

  18. In frequency modulated wave

    Text Solution

    |

  19. When a p-n junction diode is reverse biased, the flow of current acros...

    Text Solution

    |

  20. Two coils of self-inductance L(1) and L(2) are placed closed to each o...

    Text Solution

    |