Home
Class 11
CHEMISTRY
A 25 watt bulb emits monochromatic yello...

A 25 watt bulb emits monochromatic yellow light of wavelength of `0.57mum` calculate the rate of emission o0f quanta per second.

Text Solution

Verified by Experts

`25 W=25 J s^(-1)`
Energy of one photon `(E)=hv`
`=hc/lambda=(6.62xx10^(-34)xx10^(8))/(0.57xx10^(-6))`
Rate of emission of equanta per second
`=(25)/(6.62xx10^(-34)xx3xx10^(8))xx0.57xx10^(-6)`
`=7.18xx10^(19) s^(-1)`.
Promotional Banner

Topper's Solved these Questions

  • NCERT BASED EXERCISE

    CENGAGE CHEMISTRY ENGLISH|Exercise Thermodynamics|50 Videos

  • NCERT BASED EXERCISE

    CENGAGE CHEMISTRY ENGLISH|Exercise Chemical Equilibrium|73 Videos

  • NCERT BASED EXERCISE

    CENGAGE CHEMISTRY ENGLISH|Exercise Redox Reaction|25 Videos

  • ISOMERISM

    CENGAGE CHEMISTRY ENGLISH|Exercise Assertion-Reasoning Type|1 Videos

  • ORGANIC REACTION MECHANISM

    CENGAGE CHEMISTRY ENGLISH|Exercise Analytical and Descriptive|6 Videos

Similar Questions

Explore conceptually related problems

A 25 watt bulb emits monochromatic yellow light of wavelength of 0. 57 mu m. Calculate the rate of emission of quanta per second .

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

A 100 watt bult emits monochromatic light of wavelength 400 nm. Calcualte the number of photons emitted per second by the bulb.

A 100 W point source emits monochromatic light of wavelength 6000 A Calculate the total number of photons emitted by the source per second.

Consider a 20 W light source that emits monochromatic light of wavelength 600 nm . The number of photons ejected per second in terms of Avogadro's constant (N_(A)) is approximately

A 5 W source emits monochromatic light of wavelength 5000 Å . When placed 0.5 m away , it liberates photoelectrons from a photosensitive metallic surface . When the source is moved to a distance of 1.0 m the number of photoelectrons liberated will be reduced by a factor of

A 5 W source emits monochromatic light of wavelength 5000 Å . When placed 0.5 m away , it liberates photoelectrons from a photosensitive metallic surface . When the source is moved to a distance of 1.0 m the number of photoelectrons liberated will be reduced by a factor of

A 200 W bulb emits monochromatic light of wavelenght 1400 A and only 10% of the energy is emitted as light. The number of photons emitted by the bulb per second will be

A 75 W light source emits light of wavelength 600 nm. (a) Calculate the frequency of the emitted light. (b) How many photons per second does the source emit?

CENGAGE CHEMISTRY ENGLISH-NCERT BASED EXERCISE-Atomic Structure
  1. A photon of wavelength 4xx 10^(-7) m strikes on metal surface. The wo...

    Text Solution

    |

  2. Electromagnetic radiation of wavelength 242 nm is just sufficient to i...

    Text Solution

    |

  3. A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57m...

    Text Solution

    |

  4. electrons are emitted with zero velocity from a metal surface when it ...

    Text Solution

    |

  5. what is the wavelength of light emitted when the electron in a hydroge...

    Text Solution

    |

  6. how much energy is required to ionise a H atom if the electron occupie...

    Text Solution

    |

  7. What is the maximum number of emission lines when the excited electron...

    Text Solution

    |

  8. the energy associated with the first orbit in the hydrogen atom is -2....

    Text Solution

    |

  9. calculate the wavenumber for the longest wavelength transition in the ...

    Text Solution

    |

  10. what is the energy in joules, required to shift the electron of the hy...

    Text Solution

    |

  11. The electron energy in hydrogen atom is given by E(n)=-(2.18 xx 10^(-1...

    Text Solution

    |

  12. calculate the wavelength of an electron moving with a velcoity of 2.05...

    Text Solution

    |

  13. the mass of an electron is 9.1 xx 10^(-31) kg . If its K.E. is 3.0xx...

    Text Solution

    |

  14. which of the following are isoelectronic species i.e. those having the...

    Text Solution

    |

  15. write the electronic configurations of the following ions : (a) H^(-) ...

    Text Solution

    |

  16. What is the lowest value of n that allows g orbital to exist?

    Text Solution

    |

  17. An electron is in one of the 3d orbitals , give the possible values of...

    Text Solution

    |

  18. an atom of an element contains 29 electrons and 35 neutrons . Dedue (i...

    Text Solution

    |

  19. give the number of electrons in the species H(2)^(+), H(2) and O(2)^(...

    Text Solution

    |

  20. An tomic obital has n=3 , what are the possible values of l and m(l) ...

    Text Solution

    |