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Dual Nature of ...

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  • Question 1
    4 / -1

    For an electron, in the second orbit of Bohr's hydrogen atom, the moment of linear momentum is

  • Question 2
    4 / -1

    Sharp peak point A represents

  • Question 3
    4 / -1

    X–rays of wavelength 0.140 nm are scattered from a block of carbon. What will be the wavelengths of X–rays scattered at 90° ?

  • Question 4
    4 / -1

    An X-ray tube produces a continuous spectrum of radiation with its shortest wavelength of 45 × 10-2 Å. The maximum energy of a photon in the radiation in eV is (h = 6.62 × 10-34 J-s, c = 3 × 108 ms-1 )

  • Question 5
    4 / -1

    Kα and Kβ , X-rays are emitted when there is a transition of electron between the levels

  • Question 6
    4 / -1

    When two different materials A and B having atomic number Z1 and Z2 are used as the target in Coolidge γ-ray tube at different operating voltage V1and V2 respectively their spectrums are found as below.

  • Question 7
    4 / -1

    Hard X–rays for the study of fractures in bones should have a minimum wavelength of 10-11 m. The accelerating voltage for electrons in X–rays machine should be

  • Question 8
    4 / -1

    A beam of 35.0 keV electrons strikes a molybdenum target, generating the X–rays. What is the cut–off wavelength?

  • Question 9
    4 / -1

    An X–rays machine is operated at 40 kV. The short wavelength limit of continuous X-rays will be (h = 6.63×10-34J–s, c = 3×108ms-1, e = 1.6×10-19 C)

  • Question 10
    4 / -1

    Energy of characteristic X–rays is a consequence of

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