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Wave property of electron implies that t...

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)`

Text Solution

Verified by Experts

The correct Answer is:
B
`2d cos I = n lambda _(dB)`
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