AIEEE 2008 Solved Paper

Section: Physics

Question : 68 of 104

Marks: +1, -0

Wave property of electrons implies that they will show diffraction effects. Davisson and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure).

Electrons accelerated by potential V are diffracted from a crystal. If d=1A and i=30∘,V should be about

(h=6.6×10−34Js,me=9.1×10−31‌kg,e=1.6×10−19C)

[AIEEE 2008]

2000 V
50 V
500 V
1000 V

Validate

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