Home
Class 12
PHYSICS
The kinetic energy of an electron is E w...

The kinetic energy of an electron is E when the incident wavelength is `lamda` To increase ti KE of the electron to 2E, the incident wavelength must be

A

`2lambda`

B

`lambda/2`

C

`(hclambda)/(Elambda+hc)`

D

`(2hclambda)/(Elambda+hc)`

Text Solution

Verified by Experts

The correct Answer is:
C
`lambda_(1)/lambda=(omega+E)/(omega+2E)`
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-III|27 Videos

  • DUAL NATURE

    NARAYNA|Exercise NCERT BASED QUES.|26 Videos

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-I (C.W)|16 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise ASSERTION AND REASON|15 Videos

  • ELECTRIC CHARGES AND FIELDS

    NARAYNA|Exercise EXERCISE -4|43 Videos

Similar Questions

Explore conceptually related problems

The KE of the photoelectrons is E when the incident wavelength is (lamda)/(2) . The KE becomes 2E when the incident wavelength is (lamda)/(3) . The work function of the metal is

When the kinetic energy of an electron is increased , the wavelength of the associated wave will

Maximum kinetic energy of a photoelectron is E when the wavelength of incident light is lambda . If energy becomes four times when wavelength is reduced to one thrid, then work function of the metal is

Kinetic energy of the particle is E and it's De-Broglie wavelength is lambda . On increasing it's KE by delta E , it's new De-Broglie wavelength becomes lambda/2 . Then delta E is

The graph between the energy of photoelectrons E and the wavelength of incident light (lamda ) is

Kinetic energy of photo electrons is independent on........of incident radiation.

K.E of photon electrons is E . When light of wavelength, lambda falls on them.If K.E of photon electrons reduces to half i.e. E/2 , then,wavelength of incident light will be ..

Light of frequency v_0 strikes on a metal surface and electrons are ejected with kinetic energy E . If the kinetic energy is to be increased to twice of the given value , the wavelength must be changed to lamda' . which is equal to

An electron and proton have the same de-Broglie wavelength. Then the kinetic energy of the electron is

The photoelectric threshold wavelength for silver is lamda_(0) . The energy of the electron ejected from the surface of silver by an incident wavelength lamda(lamdaltlamda_(0)) will be

NARAYNA-DUAL NATURE-LEVEL-II (C.W)
  1. If light of wavelength lambda(1) is allowed to fall on a metal , then ...

    Text Solution

    |

  2. Light of wavelength lambda strikes a photo - sensitive surface and ele...

    Text Solution

    |

  3. Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on ...

    Text Solution

    |

  4. Light rays of wavelength 6000A^(@) and of photon intensity 39.6 watts/...

    Text Solution

    |

  5. Ligth of wavelength 4000A^(@) is incident on a metal surface of work f...

    Text Solution

    |

  6. The kinetic energy of an electron is E when the incident wavelength is...

    Text Solution

    |

  7. A photon of energy 15eV collides with H-atom. Due to this collision, H...

    Text Solution

    |

  8. The anode vollage of a photocell is kept fixed . The wavelength lambda...

    Text Solution

    |

  9. According to Einstein's photoelectric equation , the graph between the...

    Text Solution

    |

  10. The graph of Fig. shows the variation of photoelectric current (I) ver...

    Text Solution

    |

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

    Text Solution

    |

  12. An electron of mass m and charge e initially at rest gets accelerated ...

    Text Solution

    |

  13. If the velocity of a particle is increased three times, then the perce...

    Text Solution

    |

  14. If the momentum of an electron is changed by p, then the de - Broglie ...

    Text Solution

    |

  15. When the mass of an electron becomes equal to thrice its rest mass, it...

    Text Solution

    |

  16. Which of the following graphs correctly represents the variation of pa...

    Text Solution

    |

  17. The de Broglie wave present in fifth Bohr orbit is:

    Text Solution

    |

  18. The correctness of velocity of an electron moving with velocity 50 ms^...

    Text Solution

    |

  19. If the uncertainity in the position of an electron is 10^(-10) m, then...

    Text Solution

    |

  20. a) Name the experiment for which the adjacent graph, showing the varia...

    Text Solution

    |