Home
Class 12
CHEMISTRY
Infrared lamps are used in restaurants t...

Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising is temperature and that of the food. If the wavelength of infrared radiation is assumed to be `1500nm`, then the number of photons per second of infrared radiation produced by an infrared lamp that consumes energy at the rate of `100W` and is `12%` efficient only is `y xx 10^(19)`. Find the value of `y`.

Text Solution

Verified by Experts

The correct Answer is:
9
Promotional Banner

Topper's Solved these Questions

  • D BLOCK ELEMENTS

    RESONANCE|Exercise EXERCISE-3 PART-III|37 Videos

  • ELECTRO CHEMISTRY

    RESONANCE|Exercise PHYSICAL CHEMITRY (ELECTROCHEMISTRY)|53 Videos

Similar Questions

Explore conceptually related problems

Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food. If the wavelength of infrared radiationis assumed to be 1500 nm, and the number of quanta of infrared radiation produced per second by an infrared lamp (that consumes enregy at the rate of 100 W and is 12% effcient only) is (xx10^(19) , then the value of x is : (Given: h= 6.665xx10^(-34)J-s)

Infrared radiation are

Infrared Waves

Infrared radiation is detected by

The wavelength of infrared rays is of the order of:

If mean wavelength of light radiated by 100 W lamp is 5000 Å , then number of photons radiated per second are

RESONANCE-DPP-QUESTIONS
  1. A single electron orbits around a stationary nucleus of charge +Ze. It...

    Text Solution

    |

  2. Which one of the following relationships when graphed does not give a ...

    Text Solution

    |

  3. Infrared lamps are used in restaurants to keep the food warm. The infr...

    Text Solution

    |

  4. The number of revolutions/sec made by an electron in lind orbit is 8 t...

    Text Solution

    |

  5. In the Bohr's model , for unielectronic species following symbols are ...

    Text Solution

    |

  6. What is the ratio of the wave lengths of last lines of Balmer and Lyma...

    Text Solution

    |

  7. Number of possible sepectral lines which ,may br emitted in bracket s...

    Text Solution

    |

  8. What minimum number of atoms lions should be present in a sample of H-...

    Text Solution

    |

  9. In a mixture of sample of H-atoms and He ions, electrons in all the H-...

    Text Solution

    |

  10. Volume at NTP of 0.22 g of CO(2) is same as that of

    Text Solution

    |

  11. Which of the following is incorrect about a sample of 11.2L CH4 gas at...

    Text Solution

    |

  12. Boron has two isotopes, B-10 and B-11. The average atomic mass of boro...

    Text Solution

    |

  13. 0.2 moles of an unknown compound weigh 5.6 g. The unknown compound is

    Text Solution

    |

  14. Be^(3+) and a proton are accelerated by the same potential, their de-...

    Text Solution

    |

  15. If numerical value of mass and velocity are equal then de Broglie wave...

    Text Solution

    |

  16. If the de-Broglie wavelength of an electron revolving in 2^"nd" orbit ...

    Text Solution

    |

  17. The most probable radius (in pm) for finding the electron in He^(+) is...

    Text Solution

    |

  18. What is the ratio of minimum to maximum wavelength of radiation emitte...

    Text Solution

    |

  19. According to Heisenberg's uncertainty principle, on increasing the wav...

    Text Solution

    |

  20. The uncertainty in momentum of an electron is 1 xx 10^-5 kg - m//s. Th...

    Text Solution

    |