1.

In Davisson-Germer experiment, an electron beam of energy 60 eV is incident normally on a crystal surface. The maximum intensity is obtained at an angle of 60^(@) from the direction of incident beam, then the inter atomic distance in the crystal lattice will be :

Answer»

`1.83Å`
`3.6 Å`
`18Å`
`0.18Å`

SOLUTION :`LAMBDA= d sin phi=(12*27)/(sqrt(V))`
`d=(12*27xx2)/(sqrt(3xx60))=1*83Å`


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