Home
Class 12
PHYSICS
Two sources A and B have same power . Th...

Two sources A and B have same power . The wavelength of radiation of A is `lambda_a` and that of B is `lambda_b`.The number of photons emitted per second by A and B are `n_a` and `n_b` respectively, then

A

`lamda_(a)gtlamda_(b)`

B

if `lamda_(a)gtlamda_(b),n_(a)ltn_(b)`

C

if `lamda_(a)ltlamda_(b),n_(a)ltn_(b)`

D

if `lamda_(a)gtlamda_(b),n_(a)=n_(b)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH SERIES|Exercise EXERCISE=II|42 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - IA|2 Videos

  • ELECTRIC CHARGES AND FIELDS

    AAKASH SERIES|Exercise Practice Exercise|57 Videos

Similar Questions

Explore conceptually related problems

Photons of wavelength 660 nm are emitted from a 60 watt lamp. What is the number of photons emitted per second ?

Two coils A and B are wound on the same iron core as shown in figure. The number of turns in the coil A and B are N_(A) and N_(B) respectively. Identify the correct statement

Let n_r and n_b be respectively the number of photons emitted by a red bulb and a blue blub of equal power in a given time.

The energies of energy levels A, B and C for a given atom are in the sequence E_(A)ltE_(B)ltE_(C) . If the radiations of wavelength lambda_(1), lambda_(2) and lambda_(3) are emitted due to the atomic transitions C to B, B to A and C to A respectively then which of the following relations is correct :-

Let (n_r) and (n_b) be respectively the number of photons emitted by a red bulb and a blue blub of equal power in a given time.

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

Given two points sources having same power of 200W.One source is emitting photons of lambda_1 = 500 nm and other emitting X-ray photons of lambda_2 = 1nm . Find ratio of photon emitted from both sources.

If A and B are square matrices of order n , then prove that A and B will commute iff A-lambda\ I and B-lambda\ I commute for every scalar lambda

If A and B are square matrices of order n , then prove that A \ a n d \ B will commute iff A-lambdaI \ a n d \ B-lambdaI commute for every scalar lambda .

An electron and a photon have same wavelength lambda , what is ratio of their kinetic energies ?

AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-PRACTICE EXERCISEX
  1. Two separate monochromatic light beams A and B of the same intensity (...

    Text Solution

    |

  2. The maximum kinetic energy of an electron is E when the incident wavel...

    Text Solution

    |

  3. Two sources A and B have same power . The wavelength of radiation of A...

    Text Solution

    |

  4. The photo electric threshold wavelength for a metal is 2750A^(@), The ...

    Text Solution

    |

  5. When the incident wavelengths are lamda and lamda//2 the kinetic energ...

    Text Solution

    |

  6. A 1 kw radio transmitter operates at a frequency of 880 KHz how many p...

    Text Solution

    |

  7. The threshold wavelength for photo electric emission from a material i...

    Text Solution

    |

  8. Light of wavelength 4000A∘ is incident on a metal surface. The maximum...

    Text Solution

    |

  9. Monochromatic light incident on a metal surface emits electrons with k...

    Text Solution

    |

  10. Three metals have work functions in the ratio 2 3:4. Graphs are drawn ...

    Text Solution

    |

  11. Two photons of energies twice and thrice the work function of a metal ...

    Text Solution

    |

  12. The work function of substance is 4.0 eV. The longest wavelength of li...

    Text Solution

    |

  13. Photoelectric work function of a metal is 1eV, light of wavelength lam...

    Text Solution

    |

  14. When a monochromatic point source of light is at a distance of 0.2 m...

    Text Solution

    |

  15. The work function of a substance is 12.4 eV. The longest wavelength of...

    Text Solution

    |

  16. A surface irradiated with light of wavelength 480 nm gives out electro...

    Text Solution

    |

  17. What P.D. must be applied to stop the fastest photo electron emitted b...

    Text Solution

    |

  18. The threshold frequency for photo electric effect for a metal surface ...

    Text Solution

    |

  19. The work functions of metals A and B are in the ratio 1 : 2. If light ...

    Text Solution

    |

  20. When a metal surface is illuminated by light of wavelengths 400 nm and...

    Text Solution

    |