Home
Class 12
PHYSICS
Two separate monochromatic light beams A...

Two separate monochromatic light beams `A` and `B` of the same intensity (energy per unit area per unit time) are falling normally on a unit area of a metallic surface. Their wavelength are `lambda_(A)` and `lambda_(B)` respectively. Assuming that all the the incident light is used in ejecting the photoelectrons, the ratio of the number of photoelectrons from beam `A` to that from `B` is

A

`(A)/(B)`

B

`(D)/(A)`

C

`(A)/(B)`

D

`(B)/(A)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ATOMIC PHYSICS

    RESONANCE|Exercise Exercise (2) Only one option correct type|30 Videos

  • ATOMIC PHYSICS

    RESONANCE|Exercise Exercise-2 part-II Single and double value integer type|12 Videos

  • ATOMIC PHYSICS

    RESONANCE|Exercise Exercise 1 Part-1 subjective questions|35 Videos

  • ALTERNATING CURRENT

    RESONANCE|Exercise HIGH LEVEL PROBLEMS|11 Videos

  • CAPACITANCE

    RESONANCE|Exercise High Level Problems|16 Videos

Similar Questions

Explore conceptually related problems

A beam of light has two wavelengths 4,972Å and 6,216Å with a total intensity of 3.6xx10^(-3) W m^(-2) equally distributed among the two wavelengths . The beam falls normally on an area of 1 cm^2 of clean metallic surface of work function 2.3 eV . Assume that there is no loss of light by reflection and that each capable photon ejects one electron. The number of photoelectrons liberated in 2 s is approximately

If K_(1) and K_(2) are maximum kinetic energies of photoelectrons emitted when light of wavelength lambda_(2) and lambda_(1) respectively are incident on a metallic surface. If lambda_(1)=3lambda_(2) then

Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on the surface of a photosensitive material. If one per cent of the incident photons produce photoelectrons, then the number of photoelectrons emitted per second from an area of 1.0 cm^2 of the surface is nearly

Two monochromatic light beams of intensity 16 and 9 units are interfering.The ratio of intensities of bright and dark parts of the resultant pattern is: (a) 16/9 (b) 4/3 (c) 7/1 O (d) 49/1

A beam of light has three wavelengths 4144 Å , and 6216 Å with a total instensity of 3.6 xx 10^(-3) Wm^(-2) equally distributed amongst the three wavelengths. The beam falls normally on an area 1.0 cm^2 of a clean metallic surface of work function 2.3 eV. Assume that there is no loss of light by reflection number of photoelectrons liberated in two seconds.

Photoelectric emission is observed from a metallic surface for frequencies v_(1) and v_(2) of the incident light. If the maximum value of kinetic energies of the photoelectrons emitted in the two cases are in the ratio n:1 then the threshold frequency of the metallic surface is

A beam of light having wavelength lambda and intensity 1 falls normally on an area A of a clean surface then find out the number of photon incident on the surface.

Two beams one of red light and other of blue light of the same intensity are incident on a metallic surface to emit photoelectrons. Which one of the two beam emits electrons of greater kinetic energy?

RESONANCE-ATOMIC PHYSICS-Exercise ( Part II : Only one one correct type)
  1. In a photoelectric experiment, if stopping potential is applied, then ...

    Text Solution

    |

  2. If the frequency of light in a photoelectric experiment is double then...

    Text Solution

    |

  3. Two separate monochromatic light beams A and B of the same intensity (...

    Text Solution

    |

  4. Which one of the following graphs in figure shows the variation of pho...

    Text Solution

    |

  5. When a centimetre thick surfaces is illuminated with light of waveleng...

    Text Solution

    |

  6. The anode plate in an experiment on photoelectric effect is kept verti...

    Text Solution

    |

  7. The maximum kinetic energy of photoelectrons emitted from a surface w...

    Text Solution

    |

  8. A photon of light enters a block of glass after travelling through vac...

    Text Solution

    |

  9. We may state that the energy E of a photon of frequency nu is E =hnu, ...

    Text Solution

    |

  10. The de Broglie wavelength of an electron moving with a velocity of 1.5...

    Text Solution

    |

  11. A particle of mass M at rest dacays into two particle of masses m(1) a...

    Text Solution

    |

  12. Let p and E denote the linear momentum and energy of a photon. If the ...

    Text Solution

    |

  13. The de Broglie wavelength of an neutron corresponding to root mean squ...

    Text Solution

    |

  14. The wavelength lambda of de Broglie waves associated with an electron ...

    Text Solution

    |

  15. The orbital speed of the electron in the ground state of hydrogen is v...

    Text Solution

    |

  16. The total energy of the electron in the first excited state of hydroge...

    Text Solution

    |

  17. In above Q., the potential energy of the electron is:

    Text Solution

    |

  18. If a(0) is the Bohr radius, the radius of then n=2 electronic orbit in...

    Text Solution

    |

  19. Ionization energy of a hydrogen like A is greater than that of another...

    Text Solution

    |

  20. Which energy state of doubly ionized lithium Li^(++) has the same ener...

    Text Solution

    |