MCQ
Which crystal is used in the Davisson $–$ Germer experiment?
- AAluminum
- ✓Nickel
- CCobalt
- DZinc
The crystal used in the Davisson $–$ Germer experiment is nickel. A fine beam of electrons is made to fall on the surface of the nickel crystal. As a result, the electrons are scattered in all directions by the atoms of the crystal.
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Reason : In a purely resistive $A.C.$ circuit, the current lags behind the $e.m.f.$ in phase.
($A$) $\beta^{-}$-decay ( $\beta$ emission)
($B$) orbital or $K$-electron sasture
($C$) neutron emission
($D$) $\beta^{+}$-decay (positron emission)
