Home
Class 12
PHYSICS
The Kbeta X-ray of argon has a wavelengt...

The `K_beta` X-ray of argon has a wavelength of 0.36 nm. The minimum energy needed to ironize an argon atom is 16 eV. Find the energy needed to knock out an electron from the K shell of an argon atom.

Text Solution

Verified by Experts

Given lambda=0.36nm `
` E=1242/0.36=3450eV `
` Energy needed to ionize an argn atom =16eV `
Energy needed to knock out an electron from K-shell `
` =(3450+16)eV `
` =3466eV=3.466KeV`
Promotional Banner

Topper's Solved these Questions

  • X-Rays

    HC VERMA|Exercise Objective 2|8 Videos

  • THERMAL AND CHEMICAL EFFECT OF ELECTRIC CURRENT

    HC VERMA|Exercise Exercises|24 Videos

Similar Questions

Explore conceptually related problems

Calculate the ionisation energy of hydrogen atom as well as energy needed to promote its electron from first energy level to third energy level

How much energy is needed is to releases the electron from the second excited state in the hydrogen atom ?

The Ka X-ray of molybdenum has wavelength 71 pm. If the energy of a molybdenum atom with a K electron knocked out is 23:32 keV, what will be the energy of this atom when an L electron is knocked out?

Consider the following energies :- 1. minimum energy needed to excite a hydrogen atom 2. energy needed to ionize a hydrogen atom 3. energy released in .^(235)U fission 4. energy released to remove a neutron from a .^(12)C nucleus Rank them in order of increasing value.

As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of double ionized Li atom (Z = 3) is

Consider a hydrogen atom with its electron in the n^(th) orbital An electomagnetic radiation of wavelength 90 nm is used to ionize the atom . If the kinetic energy of the ejected electron is 10.4 eV , then the value of n is ( hc = 1242 eVnm)

Wave property of electrons implies that they will show diffraction effects. Davission and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure) The surface of a metal is illuminated with the light of 400 nm . The kinetic energy of the ejected photoelectrons was found to be 1.68 eV . The work function of the metal is : ( hc = 1240 eV-nm )

A single electron orbits a stationary nucleus of charge + Ze , where Z is a constant and e is the magnitude of electronic charge . It requires 47.2 eV to excite . Find a the value of Z b the energy required to excite the electron from the third to the fourth Bohr orbit. the wavelength of electromagnetic rediation required to remove the electron from the first Bohr orbit to infinity. d Find the KE,PE , and angular momentum of electron in the first Bohr orbit. e the redius of the first Bohr orbit [The ionization energy of hydrogen atom = 13.6 eV Bohr radius = 5.3 xx 10^(_11) m , "velocity of light" = 3 xx 10^(-8)jm s ^(-1) , Planck's constant = 6.6 xx 10^(-34)j - s]

The K_(alpha) X -ray emission line of tungsten occurs at lambda = 0.021 nm . The energy difference between K and L levels in this atom is about

The photons from the Balmer series in Hydrogen spectrum having wavelength between 450 nm to 700 nm are incident on a metal surface of work function 2 eV Find the maximum kinetic energy of ejected electron (Given hc = 1242 eV nm)

HC VERMA-X-Rays-Exercises
  1. The short-wavelength limit shifts by 26 pm when the operating voltage ...

    Text Solution

    |

  2. The electron beam in a colour TV is accelerated through 32 kV and then...

    Text Solution

    |

  3. When 40 kV is applied across an X-ray tube, X-ray is obtained with a m...

    Text Solution

    |

  4. An X-ray tube operates at 40 kV. Suppose the electron converts 70% of ...

    Text Solution

    |

  5. The wavelength of Kalpha X-ray of tungsten is 21*3 pm. It takes 11*3 k...

    Text Solution

    |

  6. The Kbeta X-ray of argon has a wavelength of 0.36 nm. The minimum ener...

    Text Solution

    |

  7. The kalpha X-rays of aluminium (Z = 13 ) and zinc ( Z = 30) have wavel...

    Text Solution

    |

  8. A certain element emits Kalpha X-ray of energy 3*69 keV. Use the data ...

    Text Solution

    |

  9. The kbeta X-rays from certain elements are given below. Draw a Moseley...

    Text Solution

    |

  10. Use Moseley's law with b = 1 to find the frequency of the Kalpha X-ray...

    Text Solution

    |

  11. The Kalpha and Kbeta X-rays of molybdenum have wavelengths 0*71 A and ...

    Text Solution

    |

  12. The wavelength of Kalpha and Lalpha X-rays of a meterial are 21.3 pm a...

    Text Solution

    |

  13. The energy of a silver atom with a vacancy in K shell is 25.31 keV, in...

    Text Solution

    |

  14. Find the maximum potential difference which may be applied across an X...

    Text Solution

    |

  15. The electric current in an X-ray tube (from the target to the filament...

    Text Solution

    |

  16. Heat at the rate of 200 W is produced in an X-ray tube operating at 20...

    Text Solution

    |

  17. Continuous X-rays are made to strike a tissue paper soaked with pollut...

    Text Solution

    |

  18. A free atom of iron emits Kalpha X-rays of energy 6.4 keV. Calculate t...

    Text Solution

    |

  19. The stopping potential in a photoelectric experiment is linearly relat...

    Text Solution

    |

  20. Suppose a monochromatic X-ray beam of wavelength 100 pm is sent throug...

    Text Solution

    |