Home
Class 12
PHYSICS
Calculate the number of photons emitted ...

Calculate the number of photons emitted per second by a 10 watt sodium vapor lamp. Assume that 90% of the consumed energy is converted into light. Wavelength of sodium light is 590nm. `h=6.62xx10^(-34)Js`

A

`1.67 xx 10^(18)`

B

`1.67 xx 10^(20)`

C

`2.67 xx 10^(19)`

D

`3.67 xx 10^(23)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • NEET MOCK TEST 1

    NTA MOCK TESTS|Exercise PHYSICS - SINGLE CHOICE|45 Videos

  • NEET MOCK TEST 11

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

Caculate the number of photons emitted per second by a 10 watt sodium vepour lamp. Assume tha t 90% of the consumed energy is converted into light. Wavelength of sodium light is 590nm. h=6.62xx10^(-34)Js

Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelengths of sodium light =590nm.

Calculate the number of photons emitted in 10 h by a 60 W sodium lamp (lamda=5893A) .

Calculate the number of photon emitted in 10 hours by a 60 W sodium lamp ( lambda of photon = 5893 Å)

Find the number of photons emitted per second by a 25 watt source of monochromatic light of wavelength 6000Å .

The number of photons emitted per second by a 62W source of monochromatic light of wavelength 4800 A^(@) is

NTA MOCK TESTS-NEET MOCK TEST 10-PHYSICS
  1. The distance of Neptune and Saturn from the Sun are respectively 10^(1...

    Text Solution

    |

  2. If a man goes from the surface of Earth to a height equal to the radiu...

    Text Solution

    |

  3. A particle starts oscillating simple harmonically from its equilibrium...

    Text Solution

    |

  4. The phase difference between two waves represented by y(1)=10 ^(...

    Text Solution

    |

  5. What will be the change in interatomic distance ( in Å ) of steel on a...

    Text Solution

    |

  6. An incompressible liquid flows through a horizontal tube as shown in t...

    Text Solution

    |

  7. Two blocks of masses 10 kg and 30 kg are placed along a vertical line...

    Text Solution

    |

  8. If a given point P is in contact with ground initially and wheel of ra...

    Text Solution

    |

  9. How many different wavelength may be observed in the spectrum from a h...

    Text Solution

    |

  10. 1 amu ( atomic mass unit ) mass is equal to energy of

    Text Solution

    |

  11. To measure the resistance of a galvanometer by half deflection method,...

    Text Solution

    |

  12. Cadmium and Broron rods are used in a nuclear reactor to

    Text Solution

    |

  13. Calculate the number of photons emitted per second by a 10 watt sodium...

    Text Solution

    |

  14. A proton when accelerated through a potential difference of V volt has...

    Text Solution

    |

  15. Find the potential difference between A and B as shown in the figure

    Text Solution

    |

  16. when the electrical conductivity of a semiconductor is due to the brea...

    Text Solution

    |

  17. Two plano-convex lenses of focal lengths 20cm and 30cm are placed toge...

    Text Solution

    |

  18. A ray of light is incident normally on one of the faces of a prism of ...

    Text Solution

    |

  19. In Young's experiment, the third bright band for the wavelength of lig...

    Text Solution

    |

  20. In Young's double slit experiment how many maximas can be obtained on ...

    Text Solution

    |