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Diffraction of the electron beam is an e...

Diffraction of the electron beam is an evidence of the fact that

A

Electrons repel each other

B

Light has wave properties

C

Electron has wave property

D

Electron has momentum

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Wave property of electron implies that they will show diffraction effected . Davisson and Germer demonstrated this by diffracting electron from crystals . The law governing the diffraction from a crystals is obtained by requiring that electron waves reflected from the planes of atoms in a crystal inter fere constructiely If a strong diffraction peak is observed when electrons are incident at an angle i from the normal to the crystal planes with distance d between them (see fig) de Brogle wavelength lambda_(dB) of electrons can be calculated by the relationship (n is an intenger)

    A
    `d sin i = n lambda _(dB)`
    B
    `2d cos i = n lambda _(dB)`
    C
    `2d sin i = n lambda _(dB)`
    D
    `d cos i = n lambda _(dB)`

  • Diffraction of sound is more evident in daily lifte than light waves, because the than diffraction of light. Because the

    A
    Wave length of sound waves is greater than that of light
    B
    Sound waves are longitudinal, while light waves are transverse
    C
    Velocity of sound waves is less than that of light
    D
    None of the above

  • The study of diffraction of electrons from a target, gives the wavelength associated as 0.65Å. The energy of the electrons will be

    A
    40eV
    B
    100 eV
    C
    356 eV
    D
    1000 eV

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