GATE Physics: Questions 9 - 11 of 290
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Question number: 9
Appeared in Year: 2014
The energy, for band electrons as a function of the wave vector, in the first Brillouin zone of a one dimensional monatomic lattice is shown as ( is lattice constant)
The variation of the group velocity is most appropriately represented by
Question number: 10
Question number: 11
Appeared in Year: 2015
Write in Short
A beam of X – ray of intensity is incident normally on a metal sheet of thickness 2 mm. The intensity of the transmitted beam is . The linear absorption coefficient of the metal sheet (in per m) is ________ (up to one decimal place).