Home
Class 11
PHYSICS
A source having luminous intensity of on...

A source having luminous intensity of one candela emits monochromatic radiation of frequency is :

A

`5.4xx10^(14)Hz`

B

`54xx10^(14)Hz`

C

`4.5xx10^(14)Hz`

D

`(1)/(683)Hz`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • NATURE OF PHYSICAL WORLD AND MEASUREMENT

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (II. Very Short Answer Questions.)|128 Videos

  • NATURE OF PHYSICAL WORLD AND MEASUREMENT

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (III. Short Answer Questions.)|24 Videos

  • NATURE OF PHYSICAL WORLD AND MEASUREMENT

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (VI. Conceptual Questions.)|20 Videos

  • MOTION OF SYSTEM OF PARTICLES AND BODIES

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWER (NUMERICAL PROBLEMS)|60 Videos

  • OSCILLATIONS

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS ( CONCEPTUAL QUESTIONS.)|24 Videos

Similar Questions

Explore conceptually related problems

In photoelectric effect, why should the photoelectric current increase as the intensity of monochromatic radiation as the intensity of monochromatic radiation incident on a photosenstive surface is increased ? Explain.

lonization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. The spectral lines emitted by hydrogen atoms according to Bohr's theory will be

According to Maxwell's theory of electrodynamics, an electron going in a circle should emit radiation of frequency equal to the frequency of revolution what should be the wavelength of the radiation emitted by a hydrogen atom in ground state if this rule is followed?

A source emitting a sound of frequency v is placed at a large distance from an observer. The source starts moving towards the observer with a uniform acceleration a. Find the frequency heard by the observer corresponding to the wave emitted just after the source starts. The speed of sound in the medium is v.

For photoelectric emission from certain metal the cut -off frequency is v . If radiation of frequency 2v impinges on the metal plate, the maximum possible velocity of the emitted electron will be(m is the electron mass).

A circular area of radius 1.0 cm is placed at a distance of 2.0 m from a point source. The source emits light uniformly in al directions. The line joining the source to the center of the area is normal to the area. It is found that 2.0xx1^-3 lumen of luminous flux is incident on the area. Calculate the total luminous flux emitted by the source and the luminous intensity of the source along the axis of the area.

A source of sound is travelling with a velocity 40 km/h towards an observer and emits a sound of frequency 2000 Hz. If the velocity of sound is 1220 km/h, then the apparent frequency heard by the observer is. …………………

PREMIERS PUBLISHERS-NATURE OF PHYSICAL WORLD AND MEASUREMENT-OTHER IMPORTANT QUESTIONS & ANSWERS (I. Multiple Choice Questions.)
  1. Which of the following is wrong matched?

    Text Solution

    |

  2. ……….. System of units was accepted by the scientists of the general c...

    Text Solution

    |

  3. A source having luminous intensity of one candela emits monochromatic ...

    Text Solution

    |

  4. When a current of 1 ampere flowing through two parallel straight condu...

    Text Solution

    |

  5. Match the following physical quantities with respect to relative unit...

    Text Solution

    |

  6. One pico farad is equal to ………….. Farad.

    Text Solution

    |

  7. Match the following :

    Text Solution

    |

  8. The value of Planck's constant is "".

    Text Solution

    |

  9. Universal time is based on :

    Text Solution

    |

  10. 1 pascal is equal to :

    Text Solution

    |

  11. Choose the correct statement from the following statements :

    Text Solution

    |

  12. Which one of the following doesn't has the same unit as others?

    Text Solution

    |

  13. Which of the following statements are correct? (i) A physical quanti...

    Text Solution

    |

  14. Inertia has the same unit as:

    Text Solution

    |

  15. Which of the following pairs of quantities and their units is a proper...

    Text Solution

    |

  16. Choose the odd man out from the following physical quantities:

    Text Solution

    |

  17. Which one of the following relations is wrong?

    Text Solution

    |

  18. 1 CSL is the largest practical unit of :

    Text Solution

    |

  19. Match the physical quantities in column I with their S.I. units in col...

    Text Solution

    |

  20. 1 minute = ……….rad.

    Text Solution

    |