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Does the cutoff wavelength lamda(min)...

Does the cutoff wavelength `lamda_(min)` of the continous x- ray spectrum increse decrease or remain the same if you (a) increase the kinetic energy of the electrons that strike the x ray target (b ) allow the electrons to strike a thin foil rather than a thick block of the target material ,(c ) change the target to an element of higher atomic number ?

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(a) decrease (b) and (c ) remains the same
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Knowledge Check

  • The minimum wavelength lambda_min in the continuous spectrum of X-rays is

    A
    Proportional to the potential difference V between the cathode and anode.
    B
    Inversely proportional to potential differece V between the cathode and anode
    C
    Proportional to the square root of the potential difference V between the cathode and the anode.
    D
    Inversely proportional to the square root of the potential difference V between the cathode and the anode.

  • The kinetic energy of electrons that strike the target is increased , then the cut-off wavelength of continuous X-rays spectrum

    A
    increases
    B
    decreases
    C
    no change
    D
    cannot be said

  • The characteristic of the electrons striking the target in an X-ray tube that, determines the intensity of X-rays is

    A
    energy
    B
    momentum
    C
    number incident per second
    D
    mass

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    If there times of lambda_(min) of continuous X- ray spectrum of target metal at 40 kV is some as the wavelength of K_(alpha) line of this metal at 30 kV , then determine the atomic number of the target metal.

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