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Electrons with energy 80 keV are inciden...

Electrons with energy `80 keV` are incident on the tungsten target of an X - rays tube , k- shell electrons of tungsten have `72.5 keV` energy X- rays emitted by the tube contain only

A

A continuous x-ray spectrum (Bremsstrahlung) with a minimum wavelength of `~0.155Å`

B

A continuous x-ray spectrum (Bremsstrahlung) with all wavelengths

C

The characteristic x-ray spectrum of tungsten

D

A continuous x-ray spectrum (Bremsstrahlung) with a minimum wavelength of `~0.155Å` and the characteristic x-ray spectrum of tungsten

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • Electrons with energy 80 keV are incdent on the tungsten target of an X - rays tube , k- shell electrons of tangsten have 72.5 keV energy X- rays emitted by the tube constain only

    A
    a contimuous X - rays spectrum (Bremasstrablung) with a miximum wavelength of `0.155Å`
    B
    a contimuous X - rays spectrum (Bremasstrablung) with all wavelength
    C
    the characteristic X - rays spectrum of tungsten`
    D
    a contimuous X - rays spectrum (Bremasstrablung) with a miximum wavelength of `0.155Å` and the characteristic X - rays spectrum of tungsten.

  • Electrons with de-Broglie wavelength lambda fall on the target in an X-ray tube. The cut-off wavelength of the emitted X-ray is

    A
    `lambda_(0)=(2mclambda^(2))/(h)`
    B
    `lambda_(0)=(2h)/(mc)`
    C
    `lambda_(0)=(2m^(2)c^(2)lambda^(3))/(h^(2))`
    D
    `lambda_(0)=lambda`

  • The target element in an X-ray tube must have a high

    A
    atomic number only
    B
    mass number only
    C
    melting point only
    D
    both atomic number and melting point
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    15. The number of values of the orbital quantum number associated with the...

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