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The wavelength of an electron of energy ...

The wavelength of an electron of energy 100 eV will be

A

`1.2A^(@)`

B

`10A^(@)`

C

`100A^(@)`

D

`1A^(@)`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • The de-Broglie wavelength of an electron of kinetic energy 9 eV is (take, h=4xx10^(-15)eV-s,c=3xx10^(10)cm//s and the mass m_(e) of electron as m_(e)c^(2)=0.5 MeV

    A
    `4xx10^(-8)` cm
    B
    `3xx10^(-8)` cm
    C
    `4xx10^(-7)` cm
    D
    `3xx10^(-7)` cm

  • The de Broglie wavelength of an electron of kinetic energy 9e V is (take h = 4xx 10^(-15) eV. Sec, c=3xx10^(10) cm/sec and the mass m_e of electron as m_e c^2=0.5 MeV

    A
    `4xx10^(-8) cm`
    B
    `3xx10^(-8) cm`
    C
    `4xx10^(-7) cm`
    D
    `3xx 10^(-7) cm`

  • The ratio of wavelength of a photon and that of an electron of same energy E will be

    A
    `sqrt((2m)/(E))`
    B
    `sqrt((E)/(2m))`
    C
    `sqrt((2m)/(E))c`
    D
    `sqrt((EC)/(2m))`

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